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On my previous car (GTO) I swapped from "regular" Kooks to the stepped ones. I personally didn't see any gains on the dyno.
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2005 GTO-IBM-A4-Sold
2011 Camaro SS/RS Synergy-1 of 255-Sold
You will be missed but you are in good hands!
2019 Challenger Hellcat
B5, Redeye, Widebody
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