I think this Yosh TRC I found sounds the best on any GSXR-1000 I've heard. It's a special race team part I got on ebay. It's the same dimentions as the cans off Mladin and Spies' bikes, 14 inches in length with a 2 1/2 inch outlet. The regular end can for a TRC is 16 inches in length with a 2 inch outlet.