06-21-2010, 05:52 PM
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#10 (permalink)
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Base Member
Join Date: Jun 2010
Location: Puerto Rico
Posts: 108
Drives: 2008 BMW E60 M5
Rep Power: 15
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Quote:
Originally Posted by esfourteen
first, I think you might be confused as to the oem exhaust setup, theres 2 cats total, one on each side, right after the exhaust manifold, before the Y pipe. thats it, no pre/secondary cats.
second, dont ruin your stock cats, pick up a set of CNT resonated test pipes, they cost $200 shipped.
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will the CNT resonated test pipes give me more sound, or is it better just to go with staright test pipes? Also I already have K&N drop ins, what kind of HP increase should I expect?
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