Thread: Do i need a retune on ess supercharger w/ stock cats?
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      05-15-2017, 03:25 PM   #10
GORDON.M3
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Drives: E92 M3 • G05 X5 M-Sport
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Running stock cats on a supercharged S65 is pretty bad... You lose a lot of power, which pretty much defeats the purpose of getting a Supercharger. If anything, use high flow cats!
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