Our 5150 AutoSport 4

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

offering peace of mind during high-RPM operation

full load top speed endurance testing on the German Autobahn

Built for turbo/drag racing

Radium Engineering Catch Can Kit, BMW E46 2004 Our 5150 AutoSport 4An 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