Radium Engineering Catch Can Kit | 1990-2005 Mazda Miata (20-0336-FL)

Thirty years of spirited Miata miles push a lot of oil vapor toward one small intake.

The Radium Engineering Catch Can Kit for the 1990-2005 Mazda Miata intercepts it: a Radium Fluid Lock catch can with 2-step oil separation baffling plumbed into the crankcase ventilation of the NA and NB, keeping oil and sludge out of the intake tract that feeds everything from stock B6 commuters to boosted BP track builds. Closed-loop routing keeps the system emissions and track legal, and the chassis-specific bracket makes the install bolt-on.

What You'll Feel

• A clean intake tract on an engine that has been ingesting its own oil vapor since the 1990s
• Detonation margin preserved on boosted builds, with oil mist out of the charge
• Sludge buildup prevented in the intake and manifold
• Simple dipstick service, checked at 3 to 4 weeks initially
• Emissions and track legality from the closed-loop routing

Features

• Catch can kit for the 1990-2005 Mazda Miata (NA and NB)
• Radium Fluid Lock catch can: 10AN ORB ports, 4AN ORB drain, 2-step baffling, O-ring sealed dipstick
• Closed loop; does not vent to atmosphere
• Chassis-specific mounting bracket, fittings, hoses, and hardware

The Details

The Miata's ventilation is simple by modern standards, which makes the catch can's job clean: intercept the vapor path, let the baffling strip the oil, and route the dried air onward in the factory pattern. Radium's pressure-sealed can design means manifold-connected routing needs no extra check valve, and the Fluid Lock baffling holds collected oil down under cornering loads, which matters in a car bought specifically for cornering loads. Turbo and supercharged BP builds gain the most, since boosted blow-by multiplies what the stock system was sized for, but even NA engines with decades of ring wear breathe heavier than new. Drain on the dipstick's schedule and the can disappears into the maintenance routine.

Kit Includes

• 1x Radium Fluid Lock catch can with dipstick
• Chassis-specific mounting bracket, fittings, hoses, and stainless hardware

Applications

• 1990-1997 Mazda Miata (NA, B6/BP)
• 1999-2005 Mazda Miata (NB, BP)