Flowmaster Outlaw Catback Exhaust w/ X-Pipe - Stainless Steel (13-14 GT) by Flowmaster

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  • Flowmaster Mustang Outlaw Cat Back Exhaust Kit (13-14) 817590
Flowmaster Mustang Outlaw Cat Back Exhaust Kit (13-14) 817590
  • Flowmaster Mustang Outlaw Cat Back Exhaust Kit (13-14) 817590
  • Flowmaster Mustang Outlaw Catback Exhaust Kit (13-14) 817590

Get aggressive sound & performance from your 2013-14 Mustang 5.0 with this Flowmaster Outlaw Catback exhaust kit!

Item #FLO-817590
MPN# 817590

Your Price: $854.97

Market Price:$1,119.06
You Save 23.60 % ($264.09)

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  • Increased Sound
  • Improved Performance
  • Bolt In Installation
  • Made In USA


  • 3" Stainless Steel Construction
  • 4" Polished Tips
  • X-Pipe Included
  • Outlaw Mufflers

What's in the Box

  • (1) Scavenger X-Pipe Assembly
  • (1) Pair of 409S Stainless Steel Tail Pipes
  • (1) Pair of Outlaw Series Mufflers with 4" Polished Stainless Tips
  • All Needed Hardware
  • Installation Instructions

Made in the USA

Product Description

Flowmaster Quality
Easily bolt on intimidating sound and increased power with Flowmaster's 2013-14 Mustang Outlaw Catback! The Outlaw Cat-back exhaust system features race-bred Outlaw mufflers for a very aggressive track-oriented sound inside the car and out. Featuring 3" mandrel-bent piping, this Outlaw system bolts directly behind the OE cats with Flowmaster's Scavenger X-pipe assembly. This combination delivers noticeable increases in horsepower and torque, while maintaining 50-state emissions legality. 4" polished stainless tips provide a finished look to the American made T409 stainless exhaust system.

Sound Note
This exhaust may exceed sound ordinances in some areas. Please check local laws before ordering.

-Fits 2013-14 Mustang 5.0L

Flowmaster Exhaust Warranty - Click Here

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Product Reviews (2)

out of 5 stars
4.5 stars
2 reviews
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4 stars    1
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2 of 2 REVIEWS
2 of 2 REVIEWS

4 Stars   Great sound poor fitment
By on 3/14/2014
I love the sound this exhaust gives my car. After I installed it, everything appeared to fit perfect. However after my first long drive I went around my car to check fitment and found that the tip on the left side had somehow found its way onto my bumper and had proceeded to melt into my bumper!!!! Talk about pissed off. I had just bought the car!!! It cleared plenty upon original install. Had to bend exhaust hanger to fix this. You figure for 800$ you wouldn't have to modify it.
From LMR.com: Several short drives to allow expansion and contraction followed by checking all clamps will prevent this type of situation.
Yes, I would recommend this item to a friend!

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5 Stars   Customer Service ROCKS!!!!
By on 7/2/2014
I recently ordered the Flow Master Outlaw Cat backs for my 2014 GT. I was having trouble getting shipping info on the drop order and contacted LMR. Lee Cox immediately responded and contacted Flow Master and worked on getting me the info I requested. Lee, you are what customer service is all about. I will definitely use LMR for my future mods just based on the help Lee gave me.

Yes, I would recommend this item to a friend!

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Vehicle Applications

Ford Mustang - 2013 (13) - 2014 (14)

About This Brand

Flowmaster - The Exhaust Technology Company
Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's.

Through use of these dyno's, Flowmaster's engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers "to the ground."

Flowmaster also utilizes Spectrum Analyzers to fine "tune" the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmaster's dedication to quality is what makes them the exhaust industry leader for Latemodel Mustangs and SVT Lightnings!

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