Quote:
Originally Posted by arpad_m
I think these cats make a big difference here. My car is also much quieter in tour mode with the Kooks green catted headers and the stock NPP exhaust, although cold starts are still earth shattering.
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Cats definitely help with smoothing out the exhaust note and helping with drone.
I also have Kooks headers with regular cats going into the NPP and it is very quiet when cruising and plenty loud when you get on it.
And yes, cold starts are shockingly loud. I scared the crap out of myself one day; coming out of a store I remote started the car when I would about 10 feet to the rear. Made me jump.
But then when the car idles down, it's very mellow and calm.