Flowmaster 817755 Exhaust System Kit. Title: Flowmaster 817755 Axle-back 409S - Outlaw Kit - DOR - Mod/Aggr Sound. Flowmaster's Outlaw Axle-back exhaust system for the 2007-2011 Jeep Wranglers with the 3.8L V6 is perfect for the person looking for an aggressive exterior and moderate interior exhaust tone, with all of the performance benefits that you would expect from Flowmaster.