Quote:
Originally Posted by Kuky
DIY EL: From reading the M4 forum, the passenger side's exhaust pipe should be extended 12 to 14 inches to equalize the exhaust pulses.
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I keep forgetting to measure mine, but I believe the AA equal length pipe actually makes the bank-2 pipe longer than bank-1.
It crosses bank-2 over to the driver's side, which has the longer pipe at the rear to clear the diff, AND it adds a bunch of bends to increase length along the way.
I will try to remember to measure, but by eyeball I would guess it adds quite a bit more than 12-14 inches. Adding the bend around the diff alone probably increases it by that much.