{"product_id":"gfb-whistling-trumpet-gfb-response-deceptor-pro-bov-black-high-boost","title":"GFB Whistling Trumpet – GFB Response\/Deceptor Pro BOV – Black High Boost","description":"\u003ch2\u003eGFB Whistling Trumpet – GFB Response\/Deceptor Pro BOV – Black High Boost\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e GFB Response\/Deceptor Pro BOV\u003cbr\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Whistling Trumpet – Black High Boost\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003cp\u003eGFB built its reputation on giving blow off valves a distinct voice, and the Whistling Trumpet is the result of years of customer requests for something different. Fitted to a \u003cstrong\u003eGFB Response\u003c\/strong\u003e or \u003cstrong\u003eDeceptor Pro BOV\u003c\/strong\u003e, this black trumpet delivers a sharp whistling note under hard acceleration instead of the standard hiss.\u003c\/p\u003e\n\n\u003cp\u003eThis listing covers SKU 5701, a direct replacement trumpet designed for GFB valves \u003cstrong\u003eT9003\u003c\/strong\u003e and \u003cstrong\u003eT9503\u003c\/strong\u003e. It swaps straight in over the factory trumpet without needing extra tools or modification.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e To generate the whistle, the valve needs to be set so most or all boost vents through the trumpet. Response valves running a 50\/50 vent split typically won't build enough velocity to whistle properly.\u003c\/p\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\u003eBlack finish trumpet for GFB Response and Deceptor Pro BOVs\u003c\/li\u003e\n\u003cli\u003eProduces a distinct whistling tone under boost\u003c\/li\u003e\n\u003cli\u003eDirect replacement for the standard trumpet\u003c\/li\u003e\n\u003cli\u003eCompatible with GFB part numbers T9003 and T9503\u003c\/li\u003e\n\u003cli\u003eSimple bolt on installation, no modification required\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\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuits GFB Response\/Deceptor Pro BOV\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease confirm your GFB valve model before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"GFB","offers":[{"title":"Default Title","offer_id":67799874961712,"sku":"5701","price":41.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/5701_e4e33189-b581-4264-9bb6-54ef17020f46.jpg?v=1789614182","url":"https:\/\/coore.com.au\/products\/gfb-whistling-trumpet-gfb-response-deceptor-pro-bov-black-high-boost","provider":"Coore | Performance \u0026 Aftermarket","version":"1.0","type":"link"}