Agree... the mid pipes are fine with stock motor.
while the muffler is more restrictive relatively, it is probably also ok with stock motor. most of the hp gain with aftermarket muffler is way up on the rpm band and might even lose a bit on the low end.
Quote:
Originally Posted by kenchan
it's really the muffler dat's restrictive on the catback. unless u go turbo the stock pipes are fine imo.
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