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Old 01-14-2021, 08:41 AM   #7
IneedAZ


 
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Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr
Join Date: Mar 2009
Location: Tampa
Posts: 5,110
Quote:
Originally Posted by Z OH 6 View Post
Green cats and a different catback will help a lot. The fact is, these cars get super loud with headers and removal of the primary cats.
So True...i have ARH 2" into ARH long system, but stock muffler. Cruising and idle not bad..Give it some throttle and very loud. I now keep it in sport for exhaust. I may have to go down from there.
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2017 HyperBlue ZL1 A10 ** Born 3/17/17**Delivered 4/08/17
2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. **807hp/762tq on 93 gas** and **848hp/792tq on e47**

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