This unique down pipe is made for the real racer. Unlike anyother down pipe this one is flanged at the resonator. This down pipe will mount up to the stock exhaust or to the Injen exhaust. Now you can remove the step down finger prongs at the resonator and mate it up to the 76mm Injen exhaust by simply using the dual flange 76mm coupler. Now you have a true flowing 76mm down pipe and exhaust system that is only offered by Injen technology(coupler only comes with the exhaust system).