I pulled off the stock cans and installed the CompWerkes stainless slip on , super easy ! Also put a K&N filter in .... I fired up the beast without the db killer insert and nearly blew out my ear drums (in garage) .... So I installed the insert and , although still pretty loud , it's much more acceptable....... I love the look of the CompWerkes stainless can !! now I've got to get the ecu remapped, and all should be good........ I always wear ear plugs too....... Cheers , Les