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 take 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.Originally Posted by cgEvan





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