i haven't changed from stock exhaust except just changed my elbow to 3in, but i cant make my mind up on what exhaust suits me best. i was curious what others have done. as far as size,brand if any,routing. i had the idea of running to the front of the rear tires to use the heat to warm my tires. but i think it may be to loud.maybe just duels out the back with no muffler i don't know whats your opinion?