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Good point, I guess I should be more specific. On my stock Hellcat there were no gains. If you are modified I don't know. There is the recall also that will get you new cats if you think there may be something wrong with yours
I am running the AFE twisted tubes high flow cats, with Borla S exhaust and the exhaust valves locked open. I also have a 2.85 pulley and tune so no CELs.
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