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Exhaust Exhaust Pipes, Systems and Components

Flowmaster

Outlaw Cat-Back Exhaust System Fits 2018-2023 Mustang Gt 5.0L Coupes & Convertibles Without Factory Active Performance Exhaust Valves. 3.00-Inch With Carbon Fiber Tips Aggressive Sound Flowmaster

$2,193.95 $2,049.95 Save $144.00

SKU: F00L 817808

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

Moderate — 2–4 hours

Overview

The Flowmaster 817808 is an emissions-legal, bolt-on cat-back exhaust system for Ford Mustang GT 5.0L (2018-2023). It features dual 3.00-inch stainless steel mandrel-bent tubing and 4.00-inch carbon fiber tips, designed to greatly improve vehicle sound. Not compatible with active exhaust models.
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Part #: 817808

The Flowmaster Outlaw Cat-back exhaust system for the 2018-2023 Ford Mustang GT 5.0L is perfect for the person looking for a very aggressive exhaust tone inside and outside the vehicle, with all of the performance benefits that you would expect from Flowmaster. This easy to bolt-on emissions-legal system features dual 3.00-inch stainless steel mandrel-bent tubing and our exclusive Scavenger Series X-pipe for a deep unique tone and maximum power.Other features include a pair of our race-proven Outlaw Series mufflers finished off with quad 4.00-inch carbon fiber tips for a modern look. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, this system includes all necessary parts, hardware and installation instructions. Notes: This system does not fit models with the Active Performance Exhaust option. Vehicles with the Factory Active Performance Exhaust option will use system #817800.Not For Vehicles With Active Exhaust ValvesVery Aggressive Interior & Exterior SoundDyno-Tuned for Maximum PerformanceOur Exclusive Scavenger Series X-PipeQuad 4.00-inch Carbon Fiber TipsFull Stainless Steel ConstructionLifetime Limited WarrantyFlowmaster Quality

Features:

  • Not For Vehicles With Active Exhaust Valves
  • Aggressive Tone
  • Very Aggressive Interior & Exterior Sound
  • Stainless Steel Construction
  • Dyno-Tuned for Maximum Performance
  • Dyno Tuned for Maximum Performance
  • Our Exclusive Scavenger Series X-Pipe
  • Made in the USA
  • Quad 4.00-inch Carbon Fiber Tips
  • Limited Lifetime Warranty
  • Full Stainless Steel Construction
  • Lifetime Limited Warranty
  • Flowmaster Quality

Outlaw Series (TM) Cat Back Exhaust System | Dual Rear Exit | Incl. 3.0 in. Tubing/Outlaw Mufflers/4 in. Quad Carbon Fiber Tips | 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 817808

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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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