I bought the SmartPartz Baffle, and it fell out after one ride. Instead of spending another $60 for one, I make one for less than $15.00.
I bought a 4 inch Galvanized pipe stand. The base measures 3 7/8 inches in Diameter. It barely fits in there.
Then there's a 1 inch x 4 inch section of pipe. I drilled 12 holes in the center of the pipe.
The fitting at the end is 1 inch to 1 1/4 inch pipe reducer. The widest part is 2 1/4 inches and centers itself in the middle of the exhaust pipe. For the Side Burner, you must grind away the outer lips of the reducer so the whole assembly will make it around the curve at the end of the exhaust. It's a tight fit, but it works.
I tightened everything as tight as I could with a bench vise and a pipe wrench, then test fit it in the exhaust. I pulled it back out to make sure it was easily removeable.
Then I clocked the mount holes at 3, 6, 9 and 12 so I could get to at least 3 of them using self-tapping screws and an air ratchet. I chocked the rear wheel so I could use sufficient force to start the screws.
It's just as quiet as the Smartpartz baffle was, which I liked.