You want the best performance?
CAI intake with scoop,
SOLO high flow cats.
and if you don't care about the possibility of voiding warranty, get a tune.
All of that together would be fantastic.
Also consider getting a ported throttle body, or definitely get it if you can't get a tune.
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2016 Camaro 1SS - 8-speed - NPP - Black bowties
2010 Camaro 1LT V6 (Sold. I will miss her!)
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