Thread: VRSF downpipes for XI pleaseeee!!!!
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      09-29-2012, 10:21 AM   #190
psmitty95
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Quote:
Originally Posted by bmwm3redblack View Post
So HP gains don't depend on size?
I'm pretty sure they do but don't all DP's neck down to 2.5" to meet up with the stock exhaust? If so I don't it going down to 2.5" earlier would have a profound effect.
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