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FPenvy

if you want to minimize rasp then add all the resonators that you can. the 18" ones on the cbe help a lot and even regular HFC you should be fine.

basically the 18" res CBE and RHFC cats is about the most quiet and least rasp version of the FI exhaust combos.

reason why you don't see as many is that most people are happy with the rasp that the 18" res and the HFC produce. but everyone is different and I
m sure you can find examples of HFC/18" CBE vids somewhere. if that's good for you then go for it. if not go RHFC. either way it's FI and you will not be disappointed.

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