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Old 02-03-2017, 09:00 AM   #5
MrChrisLS3


 
Drives: 2018 1SS M6
Join Date: Nov 2014
Location: Houston
Posts: 2,617
It's pretty amazing how much sound the stock cats absorb, so yeah, headers and high flows are going to increase the sound, there's really no way around that. However, I think, with the factory cat back, it's going to be only slightly louder than stock, with a little more "bark" perhaps.

Fitment, I believe the Kooks set up is designed to match up for a direct fit.
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