Its depends on what you want out of an exhaust. Low-end, Mid-range, or peak...
M4 is the what I run on my race bikes. Packing is done with a rivit kit. They are like 20-30 bucks @ Home Depot.
M4 is the what I run on my race bikes. Packing is done with a rivit kit. They are like 20-30 bucks @ Home Depot.