Hang on...
So your running the FI system and pulled the HF Cats off and it still sounds good?
How much of a power loss can we expect for going back to the stock cat's? Hate to sound like an old man but I wouldnt mind bringing the noise level down a notch or two if its not going to take away too much power.
Second to that, the new LONG headers bypass the high flow cats don't they?
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