I bought a ebay Top Speed 335 exhaust and it actually sounds pretty damn good with the resonators I put on it. I just got lucky and came across a Akrapovic, so I am selling the canisters and resonators from my top speed. If your looking for an upgrade in sound from stock, I am selling the two canisters and resonators if you want them. There only 2 months old in perfect shape. I am going to cut the piping about 6 - 12 inches behind the muffler so you would simply cut your stock muffler assembly off and add these with a weld. I live in San Marcos, pick up preferred. $175