offering peace of mind during high-RPM operation

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

but for minimal weight to not disrupt the iconic chassis balance of the M3

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

Radium Engineering Catch Can Kit, BMW E46 2004 offering peace of mind duringAn 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