I finally received my Rush slip on muffler, I believe it has a 1.75" baffle. It's not really much louder than stock at idle,until you get on it then it's quite a bit louder,it sounds nice though IMO. A new gasket isn't necessary, I tried to install an OEM Yamaha gasket and there is no way it will fit. I called Rush and they said no gasket was needed but may have to use some kind of high temp sealant if you have a leak and to tighten the clamp to 65 foot lbs. of torque. The installation went pretty smoothly, but if removing the muffler bracket be careful when reinstalling it. It bolts into the frame and the aluminum can strip very easily if the bolts aren't centered correctly. I started to strip mine a little but noticed it early enough to avoid a problem. I ended up re-installing the bracket first and then the muffler.
Last edited by cal55; 05-03-2011 at 09:11 AM.