Radium Engineering 20-0337-FL Dual Catch Can Kit Mazda MX-5 Miata 90-05

Vehicle Fitment

• 1990-1997 Mazda MX-5 Miata NA (1.6L I4, B6ZE - all trims)
• 1998-2005 Mazda MX-5 Miata NB (1.8L I4, BP-4W/BP-Z3 - all trims)
• 1989-1993 Eunos Roadster (Japanese-market NA Miata - 1.6L I4)

Fitment Notes

• Dual catch can kit - includes two Fluid Lock catch cans (one for the PCV line, one for the crankcase/CCV line) with all mounting hardware, fittings, and hose
• Compatible with both 1.6L (NA generation) and 1.8L (NB generation) engines - covers the full first and second-generation Miata production run
• Mounts using OEM threaded holes - no cutting, drilling, or permanent modifications required
• Factory air intake box cannot be used with this kit - an aftermarket or modified intake must be used; reference installation pictures before ordering
• Closed-loop system - does NOT vent to atmosphere (VTA); emissions and track-day legal
• Pressure-sealed Fluid Lock cans are compatible with boosted (turbocharged/supercharged) Miata applications - intake manifold connection is permitted
• For the single catch can kit (PCV or CCV side only), see 20-0336-FL

Features

• Patented Fluid Lock® sealed system prevents accumulated oil from draining back into the engine between drain intervals - maintains consistent separation efficiency over time
• Intercepts both the PCV (positive crankcase ventilation) line and the CCV (crankcase ventilation) line - provides complete crankcase oil separation at both venting points
• Large 10AN ORB inlet and outlet ports for maximum flow with minimal restriction
• 4AN ORB drain port on each catch can for easy fluid removal without removing the cans from the vehicle
• 2-step oil separation baffling removes oil mist and sludge from crankcase gases before they re-enter the intake system
• O-ring sealed dipstick on each can allows quick visual inspection of accumulated fluid level without tools
• 7 fluid ounce capacity per catch can
• Prevents oil accumulation in the intake pipe, intercooler (on boosted builds), throttle body, and intake manifold
• Lowers hydrocarbon emissions and effectively raises octane from cleaner inlet air

Specifications

• Application: CCV (Crankcase Ventilation) + PCV (Positive Crankcase Ventilation) - dual system
• System Type: Closed-Loop (non-VTA) - emissions and track legal
• Inlet/Outlet Ports: 10AN ORB (per can)
• Drain Port: 4AN ORB (per can)
• Capacity: 7 fl. oz. per catch can
• Suffix: -FL = Fluid Lock® sealed system
• Warranty: 1 Year Limited

Included Components

• 2x Baffled Fluid Lock® Oil Catch Cans (one PCV side, one CCV/crankcase side)
• Vehicle-Specific Mounting Brackets
• AN Adapter Fittings & Hose Ends
• Crankcase Ventilation Hose
• Stainless Steel Hardware

Product Description

The Radium Engineering 20-0337-FL is a complete dual PCV/CCV catch can kit with patented Fluid Lock technology for the 1990-2005 Mazda MX-5 Miata (NA and NB generations) and 1989-1993 Eunos Roadster. Both the PCV and crankcase ventilation lines are intercepted simultaneously, providing comprehensive oil separation at both crankcase venting points. The kit mounts to factory threaded boss points with no permanent modifications, and the closed-loop Fluid Lock design prevents accumulated oil from draining back into the engine between service intervals. Compatible with turbocharged and supercharged builds. Note: the factory air intake box cannot be retained with this kit.

For the single catch can kit (one line only), see 20-0336-FL.