S5 4.2L Touring Edition Exhaust System The more civilized member of the family is the S5 4.2L Touring Edition Exhaust. In addition to the central muffler from the Track Edition Exhaust, our Touring Edition system features an x-pipe for enhanced exhaust scavenging and also features AWE 180 Technology®. For S5 owners looking to fine tune the sound even more, we offer our Resonated Downpipes. Our Resonated Downpipes feature resonators larger than the stock units, along with larger diameter tubing in order to produce a mellow sound volume. Tips AWE's Touring Edition comes with 90mm (3.5 inch) slash-cut tips, available in standard chrome silver or our noted diamond black finishes. The tips sport engraved AWE logos and are double walled to ensure a mirror polish, even under hard usage. Each tip is individually adjustable, so stagger and depth into bumper can be set according to personal taste.