The 1" is the one that fits the Holy Moses pipe, and most other Big Pipes that i have seen, but im sure some take the B91XL, i would thing the 1 5/16 muffler is for the kind of pipes used on open motors
The 1" is the one that fits the Holy Moses pipe, and most other Big Pipes that i have seen, but im sure some take the B91XL, i would thing the 1 5/16 muffler is for the kind of pipes used on open motors
the 1 inch B91 fits spec pipes with screw on muffler
The holy moses line takes the same 1 5/16 RLV-B91xl muffler that is used in all other classes, this muffler is available in stock and modified versions, but both are 1 5/16 http://www.doverpoweronlinestore.com/headers__mufflers.html