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15-23 Ford Mustang 2.3L / 15-17 Mustang 3.7L Flowmaster 817823 Outlaw Axle-back Exhaust System

The Flowmaster 817823 Outlaw Axle-Back Exhaust System delivers an aggressive exhaust tone and performance-focused styling for 2015-2023 Ford Mustang 2.3L EcoBoost and 3.7L models. Featuring Outlaw mufflers, 3.00-inch mandrel-bent tubing, and black ceramic coated stainless steel tips, this system provides a bold upgrade with easy factory hanger installation.

Top Features

  • Race-proven Flowmaster Outlaw series mufflers for an aggressive sound
  • 3.00-inch mandrel-bent stainless steel tubing for improved exhaust flow
  • 4.00-inch black ceramic coated 304 stainless steel exhaust tips
  • Full stainless steel construction for performance durability
  • Dyno-tuned design for maximum performance
  • Uses factory hanger locations for simplified installation
  • Includes clamps, hardware, and installation instructions
  • Covered by Flowmaster Lifetime Limited Warranty

Vehicle Fitment

  • 2015-2023 Ford Mustang 2.3L EcoBoost
  • 2015-2017 Ford Mustang 3.7L
  • Fits Ford Mustang Coupe and Convertible models
Vendor: Flowmaster
SKU: FLO817823
Availability: 16 In Stock
$ 949.95 USD
On-Sale $ 949.95 USD
Normally $ 949.95 USD
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UPC: 700042038169
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Flowmaster 817823 Outlaw Axle-Back Exhaust System

Part Number: 817823

The Flowmaster 817823 Outlaw Axle-Back Exhaust System is designed for 2015-2023 Ford Mustang models equipped with the 2.3L EcoBoost or 3.7L engines, including both coupe and convertible applications. This performance exhaust system delivers an aggressive exterior sound with a noticeable interior tone through race-proven Outlaw series mufflers and large 3.00-inch mandrel-bent tubing. Built with full stainless steel construction, black ceramic coated stainless steel tips, and a factory hanger mounting design, this axle-back system provides an enhanced appearance, performance-focused styling, and a straightforward installation solution for Mustang enthusiasts looking to upgrade their exhaust sound.

Key Features

  • Aggressive race-proven Outlaw series mufflers for a bold exhaust tone
  • Dyno-tuned design for maximum performance
  • Large 3.00-inch mandrel-bent tubing for improved exhaust flow
  • Pair of 4.00-inch black ceramic coated stainless steel exhaust tips for an aggressive appearance
  • Full stainless steel construction for performance durability
  • Uses factory hanger locations for easier installation
  • Includes necessary parts, hardware, and installation instructions
  • Flowmaster quality performance exhaust engineering

Benefits

  • Provides an aggressive sound level that enhances the driving experience
  • Improves the Mustang’s exterior styling with large black ceramic coated exhaust tips
  • Offers a performance-grade axle-back upgrade without requiring replacement of the catalytic converter
  • Designed for a quick and easy installation using factory mounting locations
  • Backed by the Flowmaster Lifetime Limited Warranty for added product confidence

Product Specifications

  • Brand: Flowmaster
  • Part Number: 817823
  • Product Type: Axle-Back Exhaust System
  • Exhaust Series: Outlaw
  • Category: Exhaust
  • Grade Type: Performance
  • Sound Level: Aggressive
  • Material: 409 Stainless Steel piping and muffler body construction
  • Pipe Diameter: 3.00 inches
  • Exhaust Tip Diameter: 4.00 inches
  • Exhaust Tip Material: 304 Stainless Steel
  • Exhaust Tip Finish: Black Ceramic Coating
  • Exhaust Tip Quantity: 2
  • Exit Style: Dual Out Rear
  • Exhaust Tip Shape: Round
  • Exhaust Tip Cut: Angled
  • Exhaust Tip Connection: Welded
  • Muffler Quantity: 2
  • Muffler Series: Outlaw
  • Muffler Type: Reflection
  • Muffler Finish: Black High-Temperature Paint Finish
  • Muffler Body Size: 10.50 inches length x 4.00 inches height x 4.00 inches width
  • Mount Type: Uses factory hangers
  • Clamps Included: Yes
  • Clamping Type: Flat Band
  • Catalytic Converter Included: No
  • Valve Included: No
  • California Proposition 65: Yes

Install Difficulty Level

This Flowmaster Outlaw Axle-Back Exhaust System is designed for an easy installation using factory hanger locations. The system includes the required parts, hardware, and instructions to help simplify the installation process.

Vehicle Fitment

  • 2015-2023 Ford Mustang 2.3L EcoBoost
  • 2015-2017 Ford Mustang 3.7L
  • Fits Mustang Coupes and Convertibles

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

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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.
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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.

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