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15-17 Ford Mustang GT 5.0L V8 Flowmaster 817734 Outlaw Cat-back Exhaust System

The Flowmaster Outlaw Cat-back Exhaust System delivers a deep, aggressive exhaust tone and performance-focused airflow for 2015-2017 Ford Mustang GT 5.0L V8 coupes. Featuring a Scavenger Series X-pipe, Outlaw mufflers, and stainless steel construction, this bolt-on system enhances sound, style, and driving performance.

Top Features

  • Flowmaster Outlaw Series race-proven mufflers for an aggressive muscle car sound.
  • Exclusive dual 3.00-inch Scavenger Series X-pipe for improved exhaust flow and performance.
  • 3.00-inch mandrel-bent stainless steel tubing for durability and strength.
  • Dual 4.00-inch polished stainless steel exhaust tips for a premium appearance.
  • Uses factory hanger locations for easier installation.
  • Dyno-tuned design developed for maximum performance potential.
  • Covered by Flowmaster Lifetime Limited Warranty.

Vehicle Fitment

  • 2015 Ford Mustang GT Coupe - 5.0L V8 Engine
  • 2016 Ford Mustang GT Coupe - 5.0L V8 Engine
  • 2017 Ford Mustang GT Coupe - 5.0L V8 Engine
  • Does not fit convertible models.
Vendor: Flowmaster
SKU: FLO817734
Availability: 5 In Stock
$ 1,449.95 USD
On-Sale $ 1,449.95 USD
Normally $ 1,449.95 USD
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UPC: 700042031962
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Flowmaster Outlaw Cat-back Exhaust System - Part Number 817734

The Flowmaster Outlaw Cat-back Exhaust System (817734) is engineered for 2015-2017 Ford Mustang GT 5.0L V8 coupe owners seeking a powerful, race-inspired exhaust tone with performance-focused airflow. This bolt-on exhaust upgrade delivers a deep, very aggressive interior and exterior sound while enhancing the appearance and presence of the Mustang. The system features Flowmaster’s exclusive dual 3.00-inch Scavenger Series X-pipe, race-proven Outlaw Series mufflers, and mandrel-bent stainless steel tubing designed for improved exhaust flow and maximum performance potential. The complete cat-back design uses factory hanger locations and includes the necessary hardware for a straightforward installation.

Key Features

  • Exclusive Flowmaster Scavenger Series dual 3.00-inch X-pipe design for optimized exhaust flow and performance sound.
  • Race-proven Outlaw Series reflection mufflers provide a deep and aggressive exhaust note.
  • Dyno-tuned design developed for maximum performance capability.
  • Dual 3.00-inch mandrel-bent exhaust tubing supports improved airflow.
  • Large 4.00-inch polished stainless steel exhaust tips provide a premium performance appearance.
  • Uses factory hanger locations for an easier bolt-on installation.
  • Durable stainless steel construction built for long-term performance use.

Benefits

  • Creates an aggressive muscle car exhaust tone that enhances the driving experience inside and outside the vehicle.
  • Improves exhaust flow characteristics compared with restrictive factory exhaust components.
  • Provides a performance-focused appearance with polished stainless steel tips and dual rear exit styling.
  • Offers a direct-fit cat-back solution designed specifically for the Mustang GT 5.0L coupe platform.
  • Includes Flowmaster’s Lifetime Limited Warranty for added product confidence and long-term protection.

Product Specifications

  • Brand: Flowmaster
  • Part Number: 817734
  • Product Type: Cat-back Exhaust System
  • Exhaust Series: Outlaw
  • Sound Level: Aggressive
  • Material: 409 Stainless Steel Exhaust Tubing and Muffler Bodies
  • Exhaust Tip Material: 304 Stainless Steel
  • Exhaust Tip Finish: Polished Silver
  • Exhaust Tip Diameter: 4.00 inches
  • Exhaust Tip Quantity: 2
  • Main Piping Diameter: 3.00 inches
  • Tail Pipe Diameter: 3.00 inches
  • Exit Style: Dual Out Rear
  • Muffler Quantity: 2
  • Muffler Style: Outlaw Reflection Chambered Mufflers
  • Muffler Dimensions: 10.50 inches length x 4.00 inches width x 4.00 inches height
  • Muffler Finish: Black High-Temperature Paint Finish
  • Clamping Type: Flat Band Clamps Included
  • Catalytic Converter Included: No
  • Valve Included: No
  • Color: Natural Stainless Steel with Polished Silver Tips

Install Difficulty level

This Flowmaster Outlaw Cat-back Exhaust System is designed for an easy bolt-on installation using factory hanger locations and included hardware. Installation can typically be completed in approximately 1 hour by a person with basic mechanical skills and proper tools.

Vehicle Fitment

  • 2015-2017 Ford Mustang GT Coupe
  • Engine: 5.0L V8
  • Body Style: Coupe Only
  • Important Fitment Note: Does not fit Ford Mustang convertible models.

For questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.

Shipping Policy

MPT is proud to offer free shipping on most orders over $149.

  • Free shipping applies only to the contiguous United States. Shipping and handling charges will apply to orders outside the contiguous US, and the buyer is responsible for any duty fees or taxes their home country may charge to import goods.
  • With free shipping, we will choose the best shipping method for your order. We use all major carriers, including USPS, FedEx, UPS, and DHL.

Turnaround Times:

  • MPT Tunes have a standard turnaround time of 2-3 business days, beginning once we receive your MPT Tune Form.
  • We do not process orders on weekends or observed holidays, which do not count as business days.
  • Physical items that are in stock at MPT and ordered by 4PM EST will be shipped the same day. Orders placed after 4PM EST will be processed on the following business day.

Special Considerations:

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MPT Performance Returns and Refund Policy

A Return Authorization Number is required for all returns. Please contact an MPT Expert to obtain an RA # before sending anything back to us for any reason.

MPT tuning charges and license fees are Non-Refundable. The sale is final when MPT has sent the tune file over email. This includes both new tune purchases and tune updates.

Products other than MPT tunes, digital products, and MPT decals may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed it is non-refundable. We reserve the right to deny the return, should the product be received and it display signs of installation or unmentioned damage.

For vehicle programmers/tuners, the vehicle must be returned to stock if a program was installed. If a tuning device is returned and has not been returned to stock, a refund will not be issued, and your tuner will not be sent back without a shipping and handling fee.

The customer is responsible for all shipping charges incurred during the return process.

Amount Refunded:
•Returns post marked before 30 days from the date the item was received will be refunded the purchase price, minus a 25% restocking fee and the cost of shipping.
After 30 days, all sales are Final.
•Shipping charges along with any package insurance are non-refundable. If your purchase was shipped with our Free Shipping option, the cost of the shipping will be subtracted from the total refund amount.

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nGauge Tune License Fee is included in your initial purchase of MPT tunes for the nGauge. This fee is factored into the price of the tunes and becomes Non-Refundable when the stock file has been emailed to MPT.

MPT Decals are Non-Refundable, once they have been received by the customer.

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