AWE Tuning Audi B7 A4 3.2L Touring Edition Quad Tip Exhaust - Diamond Black TipsAWE Tuning Audi B7 A4 3. 2L Touring Edition Quad Tip Exhaust Diamond Black Tips The more civilized of the family is the A4 3. 2L Touring Exhaust. This system features front, central, and rear resonators to keep overall volume to an acceptable level. AWE resonators are a straight through design to aid in sound tuning without providing any restriction. Each cat back system features an H pipe crossover tube at the front to maximize exhaust scavenging for