Honestly, if you're worried about a lot of noise in your cabin, then I would suggest just going with the 18 inch resonators. 12 inch resonators are for people who want their exhaust to be loud outside and noticeable inside. I have no resonators on mine and it's borderline race car status. I love a loud, ballsy exhaust and mine was a bit too loud for me inside the car, it was actually hard to have a conversation but it sounded amazing outside and I didn't want to lose that. Thus the GTmat.
Zdayz 2014!!
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