Quote Originally Posted by M5 LITE
A cat-back exhaust adds 0whp and 0wt to a stock E30. The stock one is good. Mine had intake(no high beam)/chip and you'd still walk it. If you the cat off you can get 6 crank hp + another 20 with supersprint headers. I'd like to see you run an I with intake/chip/full exhaust. That would be fair.
You should find me one

Hopefully get to race one before I sell my car.