I have S&S tapered turbo slipons on stock headers and can't believe how loose they are on the headers. Get new clamps because you'll need them to squash those suckers onto the headers. Also, they are longer than stock mufflers too. I had Sonic (Melb brand) that fitted like a glove but the chrome was getting blue at the header junction. Very dissappointed with the fit of the S&S considering the price, but they work well. Maybe consider the Kromeworks...