-Effectively raises fuel octane and increases performance with cleaner intake air-Prevents oil buildup in the throttle body

full load top speed endurance testing on the German Autobahn

Is compatible with the simple fuel cap (Radium 20-0548-V Fuel Cap

Re-torque the studs after the engine has started and cooled to room temperature to ensure proper gasket compression

Built for turbo/drag racing

Radium Engineering Catch Can Kit, BMW E46 2004 -Effectively raises fuel octane andAn oil catch can is essential on a performance vehicle to protect the engine from elevated levels of crankcase blow by accumulated from aggressive driving. Excess oil saturated air circulating back into the air intake stream can lead to degraded performance. Radium Engineering catch cans feature large 10AN ORB ports, a 4AN ORB drain port, 2 step oil separation baffling, and an O ring sealed dipstick. E46 M3 Catch Can Kit Installation Instructions