Stock = 35.6 lb or 16.2 kg
Bosal = 24.0 lb or 10.9 kg
Magnex = 20.6 lb or 9.4 kg
Supersprint = 31.6 lbs or 14.4 kg
Stromung = ?
Exhausts Tested:
http://www.unofficialbmw.com/e36/per...aust_test.html Stock Catalytic Converter and Pipe Section = 22 lbs or 10 kg
Supersprint Resonator (eliminates Catalytic Converter) = 8 lbs or 3.6 kg