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.