The business end of this exhaust is not for the faint of heart. Dig into the throttle and you'll realize why we call this the track edition. This is a loud exhaust, with potential for drone due to the strategic elimination of certain resonators. For this reason, it can not be returned for sound. Family drivers and client entertainers, we suggest the Touring Edition Exhaust.When it comes to tips, the Track Edition finishes off with 90mm slash - cut tips, featuring the AWE logo, so they know what team you're on. All tips are individually adjustable, allowing depth into the bumper to be set according to personal taste. They're also double walled to ensure a mirror finish - even under hard usage. Lookin good In order to install our Quad Tip Exhaust, it is required that you equip your car with a B7 S4 Rear Valance and hardware, available at your local Audi dealer. Once obtained, the rear valance needs to be painted before installation. The OEM Part Number for the B7 S4 Rear Valance is 8E0807521M1RR.Note This exhaust is for manual transmission vehicles only