The iE Catback Exhaust transforms your MK8 GTI with a deep, aggressive attitude. For those craving more, pairing it with the iE ProCore Downpipe takes volume to extreme levels—great for track use but overwhelming for most on the street. This optional Sport Muffler strikes the perfect balance, adding more sound than the catback alone while toning down the full turboback setup to a street-friendly level for everyday driving.