{"title":"Fuel Pulse Dampeners","description":"  ","products":[{"product_id":"radium-fuel-pulse-damper-oem-style","title":"Radium Fuel Pulse Damper OEM Style","description":"\u003ch2\u003eRadium Fuel Pulse Damper — OEM Style, 3\/8\" NPT\u003c\/h2\u003e\n\n\u003cp\u003eThe opening and closing of fuel injectors creates pressure pulses in the fuel rail that can lead to unstable fuel pressure. This OEM-quality fuel pulse damper absorbs those oscillations via an internal diaphragm, smoothing rail pressure throughout the RPM range. Particularly effective with high-flow injectors, it can also help resolve erratic surging idle caused by inconsistent fuel pressure.\u003c\/p\u003e\n\n\u003cp\u003eThis damper features a 3\/8\" NPT male thread with impregnated pipe thread paste pre-applied for a clean, leak-free installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuits:\u003c\/strong\u003e Universal — any fuel rail with a 3\/8\" NPT female port requiring a pulse damper\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread: 3\/8\" NPT male\u003c\/li\u003e\n  \u003cli\u003eSealant: Impregnated pipe thread paste (pre-applied)\u003c\/li\u003e\n  \u003cli\u003eInternal mechanism: Diaphragm — absorbs fuel pressure oscillations\u003c\/li\u003e\n  \u003cli\u003eStyle: OEM quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAvailable Part Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e14-0128 — Fuel Pulse Damper, OEM Style, 3\/8\" NPT Male\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Manufactured in the USA to motorsport-grade tolerances\u003c\/li\u003e\n  \u003cli\u003e✅ OEM-quality diaphragm construction for reliable fuel pressure stabilisation across the RPM range\u003c\/li\u003e\n  \u003cli\u003e✅ Trusted by tuners and race teams running high-flow injector builds worldwide\u003c\/li\u003e\n  \u003cli\u003e✅ 3\/8\" NPT male with pre-applied thread paste — clean, leak-free installation\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":50219829526832,"sku":"14-0128","price":87.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/14-0128.jpg?v=1760499834"},{"product_id":"radium-fpd-r-fuel-pulse-dampener-3-8-npt","title":"Radium FPD-R Fuel Pulse Dampener - 3\/8\" NPT","description":"\u003ch2\u003eRadium FPD-R Fuel Pulse Damper — 3\/8\" NPT\u003c\/h2\u003e\n\n\u003cp\u003eThe opening and closing of fuel injectors creates pressure pulses in the fuel rail that can lead to unstable fuel pressure. A fuel pulse damper (FPD) absorbs these oscillating pulses via an internal diaphragm to stabilise rail pressure throughout the RPM range. This can help resolve idle surge (especially with high-flow injectors) and erratic lean AFR spikes commonly experienced as “stumbling” that are difficult to tune out.\u003c\/p\u003e\n\n\u003cp\u003eRadium FPDs feature a vacuum\/boost reference port, allowing proper damper performance even at elevated fuel pressures — essential for boosted systems running a 1:1 rising-rate fuel pressure regulator. The anodized aluminium housing offers two selectable threaded male fittings: 8AN ORB (Viton O-ring seal) or 3\/8\" NPT (tapered thread seal). The FPD can be mounted at any angle, including upside down. For best results, mount directly onto the fuel rail.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eFPD-R vs FPD-XR — Which Do I Choose?\u003c\/h3\u003e\n\n\u003cp\u003eBoth models have unique base “static” fuel pressure requirements. Base pressure is measured with the fuel pump running and \u003cstrong\u003eno vacuum line connected\u003c\/strong\u003e to the regulator.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-R\u003c\/strong\u003e (green top, shorter) — Base static pressure: \u003cstrong\u003e40-70 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-XR\u003c\/strong\u003e (black top, taller) — Base static pressure: \u003cstrong\u003e40-105 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The ranges above are base static fuel pressures only. Dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable, provided the base static pressure is set within the specified range and the vacuum\/boost reference line is connected.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExample 1 — Mitsubishi EVO:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM base static fuel pressure: 43.5 PSI\u003c\/li\u003e\n  \u003cli\u003eBoost pressure: 30 PSI\u003c\/li\u003e\n  \u003cli\u003eRising-rate FPR: Yes\u003c\/li\u003e\n  \u003cli\u003eFPD-R compatible? \u003cstrong\u003eYes\u003c\/strong\u003e — base static is within 40-70 PSI. Fuel pressure reaches 73.5 PSI at full boost, but the vacuum\/boost reference line must be connected.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR compatible? \u003cstrong\u003eYes\u003c\/strong\u003e — vacuum\/boost reference line not required as max pressure does not exceed 105 PSI.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eExample 2 — BMW E46 M3:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM base static fuel pressure: 72.5 PSI\u003c\/li\u003e\n  \u003cli\u003eBoost pressure: 20 PSI\u003c\/li\u003e\n  \u003cli\u003eRising-rate FPR: Yes\u003c\/li\u003e\n  \u003cli\u003eFPD-R compatible? \u003cstrong\u003eNo\u003c\/strong\u003e — base static pressure exceeds the 40-70 PSI requirement.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR compatible? \u003cstrong\u003eYes\u003c\/strong\u003e — vacuum\/boost reference line not required as max pressure does not exceed 105 PSI.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Anodized and laser-engraved aluminium top (R = Range)\u003c\/li\u003e\n  \u003cli\u003e1x Anodized aluminium body with male threads — 3\/8\" NPT\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003e4mm ID rubber vacuum hose\u003c\/li\u003e\n  \u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eModel: FPD-R (green top, shorter profile)\u003c\/li\u003e\n  \u003cli\u003eThread: 3\/8\" NPT male\u003c\/li\u003e\n  \u003cli\u003eBase static pressure range: 40-70 PSI\u003c\/li\u003e\n  \u003cli\u003eVacuum\/boost reference port: Yes\u003c\/li\u003e\n  \u003cli\u003eMounting: Any angle, including inverted\u003c\/li\u003e\n  \u003cli\u003eFuel compatibility: All fuel types including E85 and alcohol blends\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAvailable Part Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e20-0178 — FPD-R Fuel Pulse Damper, 3\/8\" NPT\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Manufactured in the USA to motorsport-grade tolerances\u003c\/li\u003e\n  \u003cli\u003e✅ CNC-machined anodized aluminium with vacuum\/boost reference port for boosted rising-rate FPR applications\u003c\/li\u003e\n  \u003cli\u003e✅ Trusted by tuners and race teams running high-power builds worldwide\u003c\/li\u003e\n  \u003cli\u003e✅ Mounts at any angle including inverted — direct fuel rail mounting for best performance\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":50219876581680,"sku":"20-0178","price":157.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/20-0178_30db6681-6431-448e-8ec6-8f20390e8d93.jpg?v=1760500495"},{"product_id":"radium-fpd-xr-extended-range-fuel-pulse-dampener-3-8-npt","title":"Radium Fuel Pulse Damper - Direct Mount (FPD-R \/ FPD-XR) | 8AN ORB or 3\/8\" NPT","description":"\u003ch2\u003eRadium Direct Mount Fuel Pulse Damper - FPD-R \/ FPD-XR (8AN ORB or 3\/8\" NPT)\u003c\/h2\u003e\n\n\u003cp\u003eInjector opening and closing creates pressure pulses in the fuel rail that can cause unstable fuel pressure, idle surge, and erratic lean AFR spikes (“stumbling”) that are difficult to tune out. The Radium Engineering Direct Mount Fuel Pulse Damper absorbs these oscillating pulses via an internal diaphragm, stabilising fuel pressure throughout the RPM range. Mounts directly onto the fuel rail for best results. Particularly effective with high-flow injectors and boosted applications using a 1:1 rising-rate FPR.\u003c\/p\u003e\n\n\u003cp\u003eRadium FPDs feature a vacuum\/boost reference port — essential for boosted systems running a rising-rate FPR, ensuring correct damper performance at elevated fuel pressures. Compatible with all fuel types including E85 and methanol.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eFPD-R vs FPD-XR — Which to Choose?\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eFPD-R (Range) — Green top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBase static fuel pressure requirement: \u003cstrong\u003e40-70 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eCompact size — ideal for space-constrained applications\u003c\/li\u003e\n  \u003cli\u003eVacuum\/boost reference line required for boosted applications exceeding 70 PSI dynamic pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFPD-XR (Extra Range) — Black top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBase static fuel pressure requirement: \u003cstrong\u003e40-105 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eWider response range — Radium recommends the FPD-XR if space permits\u003c\/li\u003e\n  \u003cli\u003eVacuum\/boost reference line not required if maximum fuel pressure does not exceed 105 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Base pressure = fuel pressure measured with the pump running and NO vacuum line connected to the regulator. Dynamic pressure from a rising-rate FPR outside these ranges is acceptable provided the base static pressure is set within the specified range and the vacuum\/boost reference line is connected.\u003c\/p\u003e\n\n\u003ch3\u003eSelection Examples\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMitsubishi Evo — 43.5 PSI base, 30 PSI boost, rising-rate FPR:\u003c\/strong\u003e Both FPD-R and FPD-XR suitable. FPD-R requires vacuum\/boost reference line connected.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBMW E46 M3 — 72.5 PSI base, 20 PSI boost, rising-rate FPR:\u003c\/strong\u003e FPD-R not suitable (base exceeds 70 PSI). FPD-XR required.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eThread Options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8AN ORB:\u003c\/strong\u003e Seals using a Viton O-ring — positive, leak-free seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3\/8\" NPT:\u003c\/strong\u003e Seals with tapered pipe threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe FPD can be mounted at any angle including inverted. For best results, mount directly onto the fuel rail.\u003c\/p\u003e\n\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAnodised and laser engraved aluminium top (R = green, XR = black)\u003c\/li\u003e\n  \u003cli\u003eAnodised aluminium body with male threads (8AN ORB or 3\/8\" NPT per selection)\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003e4mm ID rubber vacuum hose\u003c\/li\u003e\n  \u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e20-0179 — Radium Direct Mount Fuel Pulse Damper (FPD-R \/ FPD-XR, 8AN ORB or 3\/8\" NPT)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Manufactured in the USA to motorsport-grade tolerances\u003c\/li\u003e\n  \u003cli\u003e✅ CNC-machined billet aluminium components built for performance and longevity\u003c\/li\u003e\n  \u003cli\u003e✅ Trusted by high-power build tuners and race teams worldwide\u003c\/li\u003e\n  \u003cli\u003e✅ Vacuum\/boost referenced — correct performance at elevated fuel pressures on boosted builds\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with E85, pump petrol, methanol, and all exotic fuel types\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":50230031548720,"sku":"20-0179","price":174.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/20-0179_2bb99573-a467-4f79-97de-5bc0bcaf137b.jpg?v=1760849090"},{"product_id":"radium-fuel-pulse-damper-kit-toyota-supra-a80-93-02","title":"Radium Fuel Pulse Damper Kit - Toyota Supra A80 93-02","description":"\u003ch2\u003eRadium Fuel Pulse Damper Kit - Toyota Supra JZA80 MK4 (1993-2002, 2JZ-GTE)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1993-2002 Toyota Supra JZA80 (MK4) — 2JZ-GTE\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe Radium Engineering Fuel Pulse Damper Kit is a complete replacement for the OEM fuel pulse damper on the JZA80 Supra 2JZ-GTE engine. It also replaces the fuel feed line from the filter to the fuel rail, eliminating 4 restrictive OEM banjo fittings in the process. OEM rubber hoses are replaced with E85-safe PTFE fuel lines, and anodised aluminium adapter fittings are included for compatibility with both the OEM fuel rail and aftermarket 8AN ORB fuel rails.\u003c\/p\u003e\n\n\u003cp\u003eThe Radium FPD-R (vacuum-referenced fuel pulse damper) mounts in the OEM location using a stainless steel bracket, using the factory threaded bosses with no permanent modifications required. The vacuum reference makes it ideal for high-boost applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The larger FPD-XR is not compatible with this kit — it would interfere with the starter motor.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete OEM fuel pulse damper replacement\u003c\/li\u003e\n  \u003cli\u003eEliminates 4 restrictive OEM banjo fittings\u003c\/li\u003e\n  \u003cli\u003eVacuum-referenced FPD-R — ideal for high-boost 2JZ-GTE builds\u003c\/li\u003e\n  \u003cli\u003eCompatible with OEM fuel filter and OEM fuel rail\u003c\/li\u003e\n  \u003cli\u003eCompatible with aftermarket 8AN ORB fuel rails\u003c\/li\u003e\n  \u003cli\u003eMounts in OEM location using factory threaded bosses\u003c\/li\u003e\n  \u003cli\u003e6AN PTFE fuel hoses — E85 and all fuel type compatible\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003eNo permanent modifications required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e20-0389 — Radium Fuel Pulse Damper Kit (Toyota Supra JZA80 MK4, 2JZ-GTE)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Manufactured in the USA to motorsport-grade tolerances\u003c\/li\u003e\n  \u003cli\u003e✅ CNC-machined billet aluminium components built for performance and longevity\u003c\/li\u003e\n  \u003cli\u003e✅ Trusted by high-power build tuners and race teams worldwide\u003c\/li\u003e\n  \u003cli\u003e✅ Bolt-on fitment — no cutting, drilling, or permanent modifications required\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with E85, pump petrol, and flex fuel sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering Clearance","offers":[{"title":"Default Title","offer_id":50230063235376,"sku":"20-0389","price":326.25,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/20-0389.jpg?v=1760850394"},{"product_id":"radium-v2-fpd-r-fuel-pulse-dampener-8an-orb","title":"Radium V2 FPD-R Fuel Pulse Damper, 8AN ORB","description":"\u003cp\u003eThe \u003cstrong\u003eRadium Engineering 20-0776 V2 FPD-R\u003c\/strong\u003e is a compact fuel pulse damper for high-performance and boosted fuel systems. Designed to absorb oscillating pressure pulses created by fuel injector opening and closing, the FPD-R stabilises fuel rail pressure across the entire RPM range — correcting idle surge, erratic lean AFR spikes, and \"stumbling\" that are difficult to tune out, especially with high-flow injectors.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eV2 Update:\u003c\/strong\u003e Even after tightening, the 8AN ORB damper (20-0776) swivels freely, allowing the vacuum reference port to be clocked 360° for easy routing in any installation.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhat Makes Radium FPDs Unique?\u003c\/h3\u003e\n\u003cp\u003eUnlike basic fuel pulse dampers, Radium FPDs feature a \u003cstrong\u003evacuum\/boost reference port\u003c\/strong\u003e that allows the damper to maintain correct performance even at elevated fuel pressures. This is essential for boosted applications running a 1:1 rising rate fuel pressure regulator, where fuel pressure rises with boost and a non-referenced damper would become ineffective.\u003c\/p\u003e\n\n\u003ch3\u003eFPD-R vs FPD-XR — Which Do I Choose?\u003c\/h3\u003e\n\u003cp\u003eBoth dampers share the same function but have different base static fuel pressure operating ranges:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-R\u003c\/strong\u003e (green top, 20-0776) — base static pressure: \u003cstrong\u003e40-70psi\u003c\/strong\u003e. Slightly shorter body — ideal for space-constrained applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-XR\u003c\/strong\u003e (black top, 20-0777) — base static pressure: \u003cstrong\u003e40-105psi\u003c\/strong\u003e. Extended range for higher base pressure applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBase pressure\u003c\/strong\u003e = fuel pressure measured with the pump running and \u003cem\u003eno\u003c\/em\u003e vacuum line connected to the regulator.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The ranges above are base static pressures only. Dynamic pressure created by a rising-rate FPR outside this range is acceptable, provided the base static pressure is set within the specified range and the vacuum\/boost reference line is connected.\u003c\/p\u003e\n\n\u003ch3\u003eWorked Examples\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eExample 1 — Mitsubishi EVO:\u003c\/strong\u003e OEM base static pressure 43.5psi, 30psi boost, rising rate FPR.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFPD-R: ✔ Yes — base pressure within 40-70psi range. Vacuum\/boost reference line must be connected.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR: ✔ Yes — max fuel pressure (73.5psi) does not exceed 105psi. Reference line not required but recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eExample 2 — BMW E46 M3:\u003c\/strong\u003e OEM base static pressure 72.5psi, 20psi boost, rising rate FPR.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFPD-R: ✘ No — base static pressure exceeds the 40-70psi range.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR: ✔ Yes — max fuel pressure (92.5psi) does not exceed 105psi. Reference line not required but recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact range: 40-70psi base static pressure\u003c\/strong\u003e — ideal for most OEM-based fuel systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShorter body than FPD-XR\u003c\/strong\u003e — designed for space-constrained engine bay installations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVacuum\/boost reference port\u003c\/strong\u003e — maintains correct damper performance under boost with a rising rate FPR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360° swivel vacuum port\u003c\/strong\u003e — V2 design allows clocking after installation for easy routing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8AN ORB connection\u003c\/strong\u003e — Viton O-ring sealed, compatible with standard AN fuel rail fittings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounts at any angle including upside down\u003c\/strong\u003e — flexible installation for any fuel rail layout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE85 and alcohol fuel safe\u003c\/strong\u003e — compatible with all fuel types\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnodised and laser engraved aluminium housing\u003c\/strong\u003e — premium finish, permanent identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAnodised and laser engraved aluminium top (R = range, green)\u003c\/li\u003e\n  \u003cli\u003eAnodised aluminium body with 8AN ORB male threads\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003eRubber vacuum hose, 4mm ID\u003c\/li\u003e\n  \u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eAvailable Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20-0776\u003c\/strong\u003e — V2 FPD-R, 8AN ORB (this damper — 40-70psi base static range, compact body)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20-0777\u003c\/strong\u003e — V2 FPD-XR, 8AN ORB (40-105psi base static range, extended range)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✔ Designed and manufactured in the USA\u003c\/li\u003e\n  \u003cli\u003e✔ Vacuum\/boost reference port — industry-leading performance under boost\u003c\/li\u003e\n  \u003cli\u003e✔ V2 360° swivel vacuum port — easy installation in any orientation\u003c\/li\u003e\n  \u003cli\u003e✔ Trusted by professional motorsport teams and serious enthusiasts worldwide\u003c\/li\u003e\n  \u003cli\u003e✔ Exclusively distributed in Australia by Coore\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eGenuine Radium Engineering product. Stocked in Sydney for fast Australian delivery. Best mounted directly on the fuel rail. Download installation instructions for full setup guidance. For higher base static pressures, see Radium 20-0777 FPD-XR.\u003c\/em\u003e\u003c\/p\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":50230119301424,"sku":"20-0776","price":157.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/20-0776.jpg?v=1760853507"},{"product_id":"radium-v2-fpd-xr-extended-range-fuel-pulse-dampener-8an-orb","title":"Radium V2 FPD-XR Extended Range Fuel Pulse Damper, 8AN ORB","description":"\u003cp\u003eThe \u003cstrong\u003eRadium Engineering 20-0777 V2 FPD-XR\u003c\/strong\u003e is an extended range fuel pulse damper for high-performance and boosted fuel systems. Designed to absorb oscillating pressure pulses created by fuel injector opening and closing, the FPD-XR stabilises fuel rail pressure across the entire RPM range — correcting idle surge, erratic lean AFR spikes, and \"stumbling\" that are difficult to tune out, especially with high-flow injectors.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eV2 Update:\u003c\/strong\u003e Even after tightening, the 8AN ORB damper (20-0777) swivels freely, allowing the vacuum reference port to be clocked 360° for easy routing in any installation.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhat Makes Radium FPDs Unique?\u003c\/h3\u003e\n\u003cp\u003eUnlike basic fuel pulse dampers, Radium FPDs feature a \u003cstrong\u003evacuum\/boost reference port\u003c\/strong\u003e that allows the damper to maintain correct performance even at elevated fuel pressures. This is essential for boosted applications running a 1:1 rising rate fuel pressure regulator, where fuel pressure rises with boost and a non-referenced damper would become ineffective.\u003c\/p\u003e\n\n\u003ch3\u003eFPD-R vs FPD-XR — Which Do I Choose?\u003c\/h3\u003e\n\u003cp\u003eBoth dampers share the same function but have different base static fuel pressure operating ranges:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-R\u003c\/strong\u003e (green top, 20-0776) — base static pressure: \u003cstrong\u003e40-70psi\u003c\/strong\u003e. Slightly shorter for space-constrained applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-XR\u003c\/strong\u003e (black top, 20-0777) — base static pressure: \u003cstrong\u003e40-105psi\u003c\/strong\u003e. Extended range for higher base pressure applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBase pressure\u003c\/strong\u003e = fuel pressure measured with the pump running and \u003cem\u003eno\u003c\/em\u003e vacuum line connected to the regulator.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The ranges above are base static pressures only. Dynamic pressure created by a rising-rate FPR outside this range is acceptable, provided the base static pressure is set within the specified range and the vacuum\/boost reference line is connected.\u003c\/p\u003e\n\n\u003ch3\u003eWorked Examples\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eExample 1 — Mitsubishi EVO:\u003c\/strong\u003e OEM base static pressure 43.5psi, 30psi boost, rising rate FPR.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFPD-R: ✔ Yes — base pressure within 40-70psi range. Vacuum\/boost reference line must be connected.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR: ✔ Yes — max fuel pressure (73.5psi) does not exceed 105psi. Reference line not required but recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eExample 2 — BMW E46 M3:\u003c\/strong\u003e OEM base static pressure 72.5psi, 20psi boost, rising rate FPR.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFPD-R: ✘ No — base static pressure exceeds the 40-70psi range.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR: ✔ Yes — max fuel pressure (92.5psi) does not exceed 105psi. Reference line not required but recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended range: 40-105psi base static pressure\u003c\/strong\u003e — suits a wide range of high-pressure fuel systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVacuum\/boost reference port\u003c\/strong\u003e — maintains correct damper performance under boost with a rising rate FPR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360° swivel vacuum port\u003c\/strong\u003e — V2 design allows clocking after installation for easy routing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8AN ORB connection\u003c\/strong\u003e — Viton O-ring sealed, compatible with standard AN fuel rail fittings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3\/8\" NPT version also available\u003c\/strong\u003e — tapered pipe thread seal (see 20-0776 for FPD-R)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounts at any angle including upside down\u003c\/strong\u003e — flexible installation for any fuel rail layout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE85 and alcohol fuel safe\u003c\/strong\u003e — compatible with all fuel types\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnodised and laser engraved aluminium housing\u003c\/strong\u003e — premium finish, permanent identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAnodised and laser engraved aluminium top (XR = extra range, black)\u003c\/li\u003e\n  \u003cli\u003eAnodised aluminium body with 8AN ORB male threads\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003eRubber vacuum hose, 4mm ID\u003c\/li\u003e\n  \u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eAvailable Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20-0777\u003c\/strong\u003e — V2 FPD-XR, 8AN ORB (this damper — 40-105psi base static range)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20-0776\u003c\/strong\u003e — V2 FPD-R, 8AN ORB (40-70psi base static range, shorter body)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✔ Designed and manufactured in the USA\u003c\/li\u003e\n  \u003cli\u003e✔ Vacuum\/boost reference port — industry-leading performance under boost\u003c\/li\u003e\n  \u003cli\u003e✔ V2 360° swivel vacuum port — easy installation in any orientation\u003c\/li\u003e\n  \u003cli\u003e✔ Trusted by professional motorsport teams and serious enthusiasts worldwide\u003c\/li\u003e\n  \u003cli\u003e✔ Exclusively distributed in Australia by Coore\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eGenuine Radium Engineering product. Stocked in Sydney for fast Australian delivery. Best mounted directly on the fuel rail. Download installation instructions for full setup guidance.\u003c\/em\u003e\u003c\/p\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":50230119366960,"sku":"20-0777","price":174.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/20-0777.jpg?v=1760853528"}],"url":"https:\/\/coore.com.au\/ja\/collections\/fuel-pulse-dampeners.oembed","provider":"Coore | Performance \u0026 Aftermarket","version":"1.0","type":"link"}