Radium Engineering Dual Catch Can Kit | 1990-2005 Mazda Miata (20-0337-FL)

Both of the Miata's breather paths earn their own can.

The Radium Engineering Dual Catch Can Kit for the 1990-2005 Mazda Miata covers the NA and NB's full ventilation picture: two Radium catch cans with 2-step oil separation baffling plumbed into both crankcase circuits, keeping oil and sludge out of the intake tract on everything from stock commuters to boosted BP track builds. Closed-loop routing keeps the system emissions and track legal, and the chassis-specific mounting makes the install bolt-on.

What You'll Feel

• Complete crankcase coverage, both circuits intercepted independently
• Detonation margin preserved on boosted builds, oil mist out of the charge
• A clean intake tract on an engine three decades into its blow-by career
• Two simple dipstick services, checked at 3 to 4 weeks initially
• Emissions and track legality from the closed-loop routing

Features

• Dual catch can kit for the 1990-2005 Mazda Miata (NA and NB)
• Radium cans: 10AN ORB ports, 4AN ORB drains, 2-step baffling, O-ring sealed dipsticks
• Closed loop; does not vent to atmosphere; pressure sealed for boosted manifold connections
• Chassis-specific mounting, fittings, hoses, and hardware for both circuits

The Details

The dual architecture splits the duty the single-can kit consolidates, with each circuit getting its own separation and its own service schedule, which matters most on the boosted builds the Miata world loves: turbo and supercharged BPs multiply blow-by past what the stock system was sized for, and the twin cans keep pace. Radium's pressure-sealed design permits manifold connection without extra check valves, the Fluid Lock generation's baffling holds fluid down under the cornering loads the chassis exists for, and excessive collection remains the early diagnostic an aging engine offers. The single-can version (20-0336) serves builds wanting simpler coverage.

Kit Includes

• 2x Radium catch cans with dipsticks
• Chassis-specific mounting brackets, fittings, hoses, and stainless hardware

Applications

• 1990-1997 Mazda Miata (NA, B6/BP)
• 1999-2005 Mazda Miata (NB, BP)
• Single-can version: 20-0336