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Exhaust Exhaust Pipes, Systems and Components

Flowmaster

Outlaw Cat-Back Exhaust System 2005-2010 Ford Mustang Gt 4.6L Or Gt500 With 5.4L Engine Aggressive Sound Flowmaster

$1,037.95 $949.95 Save $88.00

SKU: F00L 817515

In Stock
In Stock
Ships by Sep 13
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

Flowmaster's loudest and most extreme exhaust system to date, engineered for street and strip. Includes race-style mufflers, minimal restrictions, and a raucous sound. Features heavy-duty stainless steel piping and MIG-welded stainless steel Outlaw-series mufflers for durability. Dyno-proven power gains throughout the RPM band.
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Part #: 817515

This Flowmaster Outlaw Cat-back exhaust system is designed for 2005-2010 Ford Mustang GT 4.6L, and GT500 with 5.4L engine and is perfect for the person looking for a deep aggressive sound level both inside and outside the car. This bolt-on emissions-legal system features 2.50-inch mandrel-bent stainless steel tubing leading into a pair of our race-proven Outlaw Series mufflers with large 3.00-inch outlets for maximum performance. The system uses the factory hanger locations for easy installation and is finished off with a pair of large 4.00-inch polished stainless steel tips embossed with the Flowmaster logo. This exhaust system fits both coupes and convertibles and is covered by our Lifetime Limited Warranty. Includes all necessary parts, hardware and easy to follow instructions for an installation you can do at home. Note: Fits coupes and convertibles.

Features:

  • Mandrel Bent 16ga 409 Stainless Tubing
  • Mandrel-bent Stainless Steel Construction
  • Limited Lifetime Warranty
  • Deep Aggressive Interior/Exterior Sound
  • Aggressive And Powerful Exterior Exhaust Tone
  • Dyno Tuned For Maximum Performance
  • Incl. Hangers and Hardware For Easy Installation
  • Race-proven Outlaw Mufflers
  • Cat Back
  • Lifetime Limited Warranty
  • Dual Out Rear Exit
  • Flowmaster Quality
  • Dyno Tuned for Maximum Performance
  • Easy Installation
  • True Bolt-On Installation
  • Made in the USA

Outlaw Series (TM) Cat Back Exhaust System | Dual | Dual Out Rear Exit | 2.5 in. Tubing | Incl. Outlaw Mufflers/4 in. Round Polished Tip | 409 Stainless Steel

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandFlowmaster
Part NumberF00L 817515

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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