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TIR header installed-quiter exhaust!?
I installed a T1R header yesterday and much to my surprise (not that I would have known any better though), the exhaust got quieter-- quite a bit so actually. I have the T1R VIP (axelback). I definitely feel a low/mid power increase, but did not expect the car to be quieter.
Is this pretty much the norm?
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Trying to do it right.
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