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24-26 Ford Mustang GT 5.0L V8 / 2.3L V6 Flowmaster 818163 Outlaw Axle-Back Exhaust System

The Flowmaster 818163 Outlaw Axle-Back Exhaust System delivers an aggressive exhaust tone, improved exhaust flow, and a custom appearance for 2024-2026 Ford Mustang GT and EcoBoost models. Featuring Outlaw mufflers, 3.00-inch 409 stainless steel tubing, and polished 4.00-inch tips, this performance upgrade is built for durability and style.

Top Features

  • Outlaw series mufflers provide an aggressive, deep performance exhaust sound.
  • Maximum dyno gains of up to 8 hp and 7 lb-ft over stock exhaust at the rear wheels.
  • 3.00-inch mandrel bent 409 stainless steel tubing maximizes exhaust flow.
  • Dual 4.00-inch polished stainless steel tips enhance the Mustang's appearance.
  • Uses factory hanger locations for an easy installation.
  • Includes necessary installation hardware.
  • Backed by Flowmaster's Lifetime Limited Warranty.

Vehicle Fitment

  • 2024-2026 Ford Mustang GT – 5.0-liter V8 engine
  • 2024-2026 Ford Mustang EcoBoost – 2.3-liter engine
  • Fits coupe and convertible models with non-valved factory exhaust systems
Vendor: Flowmaster
SKU: FLO818163
Availability: 4 In Stock
$ 1,065.95 USD
On-Sale $ 1,065.95 USD
Normally $ 1,065.95 USD
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UPC: 090127843932
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Flowmaster 818163 Outlaw Axle-Back Exhaust System

The Flowmaster 818163 Outlaw Axle-Back Exhaust System is designed for 2024-2026 Ford Mustang GT 5.0-liter V8 and EcoBoost 2.3-liter models equipped with the non-valved factory exhaust system. This performance exhaust upgrade delivers an aggressive Outlaw exhaust tone while helping improve exhaust flow and rear-wheel performance. Dyno testing measured maximum gains of up to 8 horsepower and 7 lb-ft of torque over the stock exhaust system. Built with durable 409 stainless steel tubing, polished stainless steel tips, and Flowmaster Outlaw muffler technology, this axle-back system adds a custom appearance and enhanced driving experience to the iconic Mustang platform.

Key Features

  • Flowmaster Outlaw series performance mufflers provide an aggressive, deep, powerful exhaust sound.
  • Maximum dyno gains of up to 8 hp and 7 lb-ft over the stock exhaust at the rear wheels.
  • 3.00-inch 16-gauge mandrel bent 409 stainless steel tubing helps maximize exhaust flow.
  • Dual 4.00-inch polished stainless steel exhaust tips provide a custom performance appearance.
  • Uses factory hanger locations for a straightforward installation.
  • Includes necessary hardware for installation.
  • Designed for both coupe and convertible Ford Mustang applications.

Benefits

  • Enhances the Mustang driving experience with a more aggressive exhaust note.
  • Improves exhaust flow for potential performance gains compared to the factory exhaust system.
  • 409 stainless steel construction provides durability and improved long-term corrosion resistance.
  • Factory mounting locations help simplify installation and maintain proper fitment.
  • Backed by Flowmaster's Lifetime Limited Warranty for added ownership confidence.

Product Specifications

  • Brand: Flowmaster
  • Part Number: 818163
  • Product Type: Axle-Back Exhaust System
  • Exhaust Series: Outlaw
  • Category: Exhaust
  • Material: 409 Stainless Steel
  • Pipe Diameter: 3.00 inches
  • Pipe Color: Silver
  • Exhaust Tip Material: 304 Stainless Steel
  • Exhaust Tip Color: Silver
  • Exhaust Tip Finish: Polished
  • Exhaust Tip Diameter: 4.00 inches
  • Exhaust Tip Quantity: 2
  • Exhaust Tip Shape: Round
  • Exhaust Tip Cut: Angled
  • Exhaust Tip Edge: Angle Cut
  • Exhaust Exit Style: Dual Out Rear
  • Muffler Quantity: 2
  • Muffler Type: Reflection
  • Muffler Material: 409 Stainless Steel
  • Muffler Finish: Black High-Temperature Paint Finish
  • Muffler Color: Black
  • Muffler Body Dimensions: 10.50 inches length x 4.00 inches width x 4.00 inches height
  • Muffler Overall Length: 16.75 inches
  • Sound Level: Aggressive / Moderate
  • Valve Included: No
  • Mount Type: Uses factory hangers
  • Clamps Included: Yes
  • Clamping Type: Flat Band
  • Catalytic Converter Included: No
  • Grade Type: Performance

Install Difficulty level

This Flowmaster 818163 Outlaw Axle-Back Exhaust System is designed for an easy installation using factory mounting locations. The system includes necessary hardware and is intended for a straightforward upgrade from the factory exhaust system.

Vehicle Fitment

  • 2024-2026 Ford Mustang GT with 5.0-liter V8 engine
  • 2024-2026 Ford Mustang EcoBoost with 2.3-liter engine
  • Fits coupe and convertible models equipped with non-valved factory exhaust systems

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:

  • Items not stocked at our location will follow the same processing times but may experience lead-time delays and could incur additional charges. Shipping methods may vary for these items based on what was paid and the requested delivery speed. If you need an item by a specific deadline, please contact an MPT Expert.
  • SCT Tuner Orders with the Prioritized Order option must have their tune forms submitted by 3PM EST to be completed the same day. Forms submitted after this time will be processed the next business day.
  • Orders will ship to the billing address listed on your order. If paying by credit or debit card, we can only ship to the billing address. Contact an MPT Expert for assistance if you need a different shipping address.

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.

HP Tuners Credits are assigned to the HP Tuners product with the submitted serial number and cannot be transferred. Once you load a tune to your vehicle with the RTD, these credits are Non-Refundable.

Digital products and files that have no ability to be taken back physically, such as an SCT Tuner Unlock, are Non-Refundable.

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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