Flowmaster’s Outlaw Series cat back exhaust system # 817691 via Marken Performance fits the 2009-2014 Ford F-150 p/u truck.  This bolt-on DOR/DOS (Dual Out Rear or Dual Out Side) emissions-legal system for trucks with the 4.6L, 5.0L and 5.4L V8 engines feature a stainless steel Super 10 Series aggressive sounding muffler and dual mandrel bent 3” in and out stainless steel pipes for maximum performance.  The system also features Black Ceramic coated 4” double wall stainless steel tips.  This gives maximum sound levels both inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster.  The exhaust system is manufactured in the USA and is covered by Flowmaster’s Lifetime Limited Warranty.  Designed for an easy fit, this system includes all necessary parts and hardware for installation.  

Note: Fits all wheelbases and both 2 and 4 wheel drive models.  

  

For the 2004-2008 Ford F-150 trucks with the 4.6L and 5.4L V8 engine use Part # 817696

  

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Flowmaster’s American Thunder Axle-back part # 817612 fits the 2013-2014 Mustang GT500 with 5.8L Engine.  This bolt on 409S Stainless Steel system features dual specially tuned resonator mufflers with quad 3.50” stainless tips that have machined aluminum edges. It gives an aggressive exterior sound level while maintaining a tolerable interior sound with all of the performance benefits that you would expect from Flowmaster.