Radium Dual Fluid Lock Catch Can Kit - Mazda MX-5 NA NB 89-05

Radium Dual Fluid Lock Catch Can Kit - Mazda MX-5 NA / NB (1989-2005)

Suits:

• 1989-1997 Mazda MX-5 NA — 1.6L (B6) & 1.8L (BP)
• 1998-2005 Mazda MX-5 NB — 1.6L (B6) & 1.8L (BP)

⚠️ Important: The factory OEM air intake box cannot be used with these kits. Reference the installation pictures before ordering.

The Radium Engineering Dual Fluid Lock Catch Can Kit is the complete crankcase ventilation solution for the Mazda MX-5 NA and NB, combining both the PCV side and crankcase side catch cans in a single purchase. Both cans function completely independently of each other. Kits mount using OEM holes with no cutting, drilling, or permanent modifications required. If purchasing the dual kit, all engine breather ports will be isolated for optimal performance.

This is a closed loop system — it does not vent to atmosphere (VTA), making it emissions compliant and track legal. Each catch can features large 10AN ORB ports, a 4AN ORB drain port, 2-step oil separation baffling, an O-ring sealed dipstick, and a 7 fl oz capacity.

MX-5 Catch Can System Overview

PCV Catch Can: Runs inline with the PCV valve, retaining factory function. During idle, steady-state cruising, and deceleration, metered vacuum would normally draw crankcase vapour, unspent fuel, and oil sludge into the intake manifold. The Radium catch can intercepts this before it reaches the engine. Because Radium catch cans are pressure sealed, a direct intake manifold connection is permitted on boosted applications.

Crankcase Catch Can: Runs inline with the crankcase breather port. At high load (WOT), captures high crankcase blow-by flow that would otherwise accumulate as oil and sludge in the intake pipe and intercooler — reducing thermal efficiency and performance over time.

Benefits

• Raises effective octane and improves engine performance from cleaner inlet air
• Prevents oil buildup in the intake, intercooler, throttle body, and intake manifold
• Lowers hydrocarbon emissions
• Excessive oil collection can indicate a damaged engine — dipstick allows easy monitoring
• Capacity: 7 fl oz per catch can

Part Number:

• 20-0337-FL — Radium Dual Fluid Lock Catch Can Kit (Mazda MX-5 NA/NB, 1989-2005)

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ CNC-machined billet aluminium components built for performance and longevity
• ✅ Trusted by high-power build tuners and race teams worldwide
• ✅ Bolt-on fitment — no cutting, drilling, or permanent modifications required
• ✅ Closed loop design — emissions compliant, track legal, and compatible with boosted MX-5 builds