Flowmaster's Outlaw Cat-back exhaust system for the S550 with the Active Performance Exhaust is a great upgrade for the person looking for an aggressive exhaust tone inside and outside, with all of the performance benefits that you would expect from Flowmaster. This easy to bolt-on emissions-legal system for the 5.0L V8 features a pair of 409S stainless steel Outlaw Series mufflers with 3.00 inch stainless steel mandrel bent pipes and scavenger x-pipe. The system finishes off with Quad 4.00 inch black ceramic coated tips. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
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