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You already know my opinion so hopefully someone else will chime in. I prefer to get rid of the nearly 20 year old cat and cut down the heat on my air cooled engine. I wouldnt go F III with the high flow cat. What did you think of the motor sound package with the x pipe? Plus you get actual HP and reduced heat then see if you need more sound with fister II.
Lol, I sure do know what you prefer Harold...your cat bypass sounds great, but while I'm no tree hugger, I would like to contain the stinky stuff and keep the cat. I am definitely leaning towards the FD 200 cell cat with my MS...decisions decisions