The DualPhase mid pipe Conversion Kit deploys additional helmholtz properties further upstream, working in tandem with the 180 Technology - equipped rear section of the standard Touring Edition Exhaust, to keep harsh, drone - prone frequencies in check when paired to an aftermarket downpipe. don't have an aftermarket downpipe You can still equip the DualPhase mid pipe to the factory downpipe for an OEM experience. Please note, this Conversion Kit is intended for those who already have a Touring Edition and are looking to refine their sound further. If you're looking for a full system, we have those, too AWE's No CEL Guarantee, Perfect Fitment Guarantee, and Lifetime Warranty come standard.