The FatCat w/Quiet baffles is perfect for Stage I and II mods. And it sounds great. If you're really hot rodding the motor, I'd use the Big Bore muffler with it. But it's much louder. Don't use the Borzilla. It's too big.
Hoist!
Well, thanks to Hoist, Doc and all of you here I will now have to spend another $1200 or so. After much mind altering confusion I have made up my mind, fat cats, TTS tuner and that new K&N stage 1 breather. Sad to say I will probably have all this stuff, and have it on before I ever get ride the d@mn bike as crappy as the weather has been and appears it's going to continue to be. I hate winter! If this real estate would turn around I would sell this house and transfer to Florida or Texas.