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      04-02-2012, 11:17 AM   #8
ModBargains III
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Drives: E92 335i, 135i, E46 M3, 540i
Join Date: Sep 2011
Location: 1721 E. Lambert Rd. Unit C, 90631 La Habra, CA

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Quote:
Originally Posted by NYX5M View Post
do i need to retune with these downpipes?
A re-tune isn't necessary, but recommended, especially seeing that the motor in your M has so much potential, might as well release the full potential of that beast!
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