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      05-16-2013, 10:40 PM   #124
bdaddylo
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Drives: 2017 F80 M3
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Quote:
Originally Posted by Ian///M View Post
Before & after dynos show secondary cats in the mid pipe are very restrictive. I gained 12Kw from putting on MadDad mids and the sound is great. Other choices are N55, Remus, Akra or Berk mids
Mid pipe gains are well documented. My question is what is your basis for stating that there are little gains to be had from an axle back exhaust.
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1991 E30 M3/Brilliantrot
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