Quote:
Originally Posted by Em/1
I am interested in this problem too, and have thought that most of the restriction is in the DP and then MP, not so much aft of the mid pipe. So figured most effective for power and some reasonable noise would be to keep stock "muffler" and get rid of both cats, tho assumes a tune to take care of CEL and to access the increased potential power. Anyone tried this approach?
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I am assuming that any BMW service can erase CEL in case we swap to catless dps and mids but keep the stock muffler, technically speaking. They won't do it because the cars are still in warranty period etc. Dilemma but could be solved by some good coder.
I really think that this AR dps + Maddad pipes with stock muffler could sound like hell plus give optimum gains in hp/torque/response.
Anything else that needed to be taken into account about dps? Gas smell maybe?