Quote:
Originally Posted by BigBoosting
Those numbers seem odd, thats what a stock M3 puts down. Of course dyno to dyno comparisons aren't equal, but my car with your same mods made 380whp and 275tq as do most M3's with test pipes and a tune.
If you install the headers and then happen to make 380ish whp its going to look like the headers and x-pipe alone added 40 more hp. When in fact your "baseline" numbers are off for some reason.
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Absolute number comparison are 100% meaningless. All that matters is the delta after after controlling for variables.
Quote:
Originally Posted by SAMM3Y
Well those results are fantastic! +15whp +8trq to the wheels plus the added sound! Great! I'd be very happy!.... now I want some!!
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100% agree! Solid gains for sure, even after accounting for the removal of the secondary cats. If one had a lift, this would be a great mod if not for the sound alone.