Quote:
Originally Posted by E90Company
Downpipes or secondary cat delete. Also, unplug the actuator in the trunk for the true performance exhaust
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What he said, you might be pleasently suprised in the difference it makes. If it's still not loud enough for you then you can get some DP's. I don't have a 335is but the golf t mod made more of a difference than dp's and swapping out the resonater with an x pipe.