Saito .91 is a 4 stroker, so no I didn't use a pitts muffler. I mounted it sideways with the valve covers sticking out the side and the muffler pointing down to the back. I also had to cut a channel in the bottom of the cow so the muffler didn't rub. I put a dubro exhaust deflector on it so the exhaust would hit the slant before the gear...

Mike