Love the D&D Boarzilla and would have used on my bike, but fat cat with performance baffle produced better numbers. I think the Boarzilla is too much pipe for a 120 JMHO. One pipe or two out the back?
Not so in my case, Pete. It will help on the WFO, top end speed. I can feel the difference from about 4500 to 6000 RPM's, as opposed to the RINEHART's. The RINEHART's sure looked good, though. The "Borzilla" is startin' to grow on me. Gotta' get a Chrome Sprocket Cover. Went with the single pipe. Couldn't stand the thought of somethin' fake on Ol' Maudie.
Later--HUBBARD