Radium Fluid Lock Catch Can Kit - BMW 135i / 335i / 535i (N54)

Suits:

• BMW 135i — E82 / E87 / E88 (N54, 3.0L Twin Turbo)
• BMW 335i — E90 / E91 / E92 / E93 (N54, 3.0L Twin Turbo)
• BMW 535i — E60 / E61 (N54, 3.0L Twin Turbo)

The Radium Engineering Fluid Lock Catch Can Kit is engineered specifically for the BMW N54 twin turbo engine. The kit secures to the OEM power steering reservoir mount with no cutting or drilling required. N54-specific billet 10AN adapter fittings are included, eliminating the need to modify the OEM vent tubing.

This is a closed loop system — it does not vent to atmosphere (VTA), making it emissions compliant and track legal. Clean filtered air routes back through the engine to promote negative crankcase pressure for optimal performance, while preventing unwanted oil vapours from entering the cabin.

Specifications

• Capacity: 7 fl oz
• Height (without fittings): 5"
• Outside Diameter: 2.45"
• Ports: 10AN ORB inlet/outlet, 4AN ORB drain
• Filtration: Stainless steel media — cleanable and reusable
• Baffling: 2-step oil separation

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

Kit Includes

• Anodised aluminium oil catch can with integrated dipstick
• Anodised aluminium laser-cut BMW specific mounting bracket
• Anodised aluminium 10AN N54-specific PCV adapter fittings
• Anodised aluminium 10AN hose ends and adapter fittings
• 10AN PCV hose for custom applications
• Stainless steel mounting hardware

Part Number:

• 20-0373-FL — Radium Fluid Lock Catch Can Kit (BMW 135i / 335i / 535i, N54)

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 E85 and flex fuel builds