Quote:
Originally Posted by tuj
I ordered the "performance exhaust" from BMW. Is this the same exhaust that they are putting on the 135is models when they hit port? Is it worth a few ponies or just a better sound?
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Regarding your second question... BMW used to claim 5hp and 3ft-lb, but I notice they no longer quote any numbers on bmwusa.com.
Others have dyno'd it and lost power, see
http://www.eurotuner.com/techarticle...mance_exhaust/ for more details.
Personally, I don't care if I lost a little power, the sound is worth it. I've never cared for "aftermarket exhausts", but I love the BMW PE.