Quote:
Originally Posted by BMW DIY Guy
Yes, I have installed into F80 M3s, F82 M4s and 2 F87 M2Cs counting mine. The AA midpipes and downpipes are identical, with only the ABs different length. The M3/4 AB pipes are longer than those provided for the M2Cs.
The only appreciable difference, as the motor is (discounting oem tunes) essentially the same along with DPs, are the longer AB pipes by (guessing) 8 inches.
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Then maybe thats the difference?
I personally know a local guy with an m2c. AA took his car in (after trying the EL) and made the m3/4 midpipe fit his car somehow with some work, and it still did not sound good, the rasp at low/mid rpm persisted, and ultimately lead to removal of the midpipe all together.