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Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879

Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879
Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879Flowmaster 2011-2012 Ford Mustang FlowFX Axle-Back Exhaust System 717879
$760.99 ea
NEWARRIVING SOONEstimated Ship Date 05/29/2025 (If Ordered Today)12 Available from HOLLEY PERFORMANCE PRODUCTS as of 05/09/2025
Model: 4005231
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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Introducing our new FlowFX® Axle-back exhaust system for 2011-2012 Ford Mustang GT coupes and convertibles with the 5.0L engine. Features include 3.00-inch mandrel-bent stainless steel tubing running into a pair of compact round FlowFX "straight-through" mufflers for a deep and powerful tone. The large 3.00-inch core mufflers ensure maximum performance, are constructed from bright 409S stainless steel and utilize the factory hanger locations for a quick and easy installation. The system is finished off with large 4.50-inch black ceramic coated stainless steel tips filling out the factory exhaust cutouts. Includes all necessary parts, hardware, and detailed instructions. Notes: Also fits 2012 Mustang Boss 302 model.
Features:
  • FlowFX "Straight-through" Large Core Performance Mufflers
  • Large 4.50-inch Black Ceramic Coated Stainless Steel Tips
  • Dyno-tuned for Maximum Performance
  • Mandrel-bent Stainless Steel Tubing
  • Uses the Factory Hanger Locations
  • Lifetime Limited Warranty
  • Quick & Easy Installation
  • Deep Powerful Sound
Fits 2011-2012 Ford Mustang GT 5.0L Coupes & Convertibles. Also fits 2012 Mustang Boss 302 model.
Installation Notes:
Fits 2011-2012 Ford Mustang GT 5.0L Coupes & Convertibles. Also fits 2012 Mustang Boss 302 model.
About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Downloads:

Download Name File Size
fm_warranty_general.pdf88.58KB
717879_instructions.pdf1.9MB

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine
Ford Mustang Boss 302 2012 5.0L / 302 / V8
Ford Mustang GT 2011 5.0L / 302 / V8
Ford Mustang GT 2012 5.0L / 302 / V8

Specifications:

California Proposition 65 Chemical Name Chromium (hexavalent compounds), Nickel (Metallic)
California Proposition 65 Required Yes
Emission Code 5
Exhaust Series FlowFX
Exit Position Dual Out Rear
Heat Shield No
Material 409 Stainless Steel
Mount Type Uses Factory Hangers
Muffler Body Length (in) 14
Muffler Color Natural
Muffler Finish Brushed
Muffler Inlet Diameter 3
Muffler Inlet Location Centered
Muffler Material 409S Stainless Steel
Muffler Outlet Diameter 3
Muffler Outlet Location Centered
Muffler Overall Length (in) 35.5
Muffler Part Number Kit Only
Muffler Quantity 2
Muffler Series FlowFX
Muffler Shape Round
Muffler Type Absorption
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Single Dual Dual
Sound Level Moderate
System Type Axle-back
Tip Cut Angle
Tip Diameter 4.5
Tip Edge Style Rolled
Tip Finish Black Ceramic
Tip Length 5.25
Tip Logo Embossed
Tip Material 304 Stainless
Tip Quantity 2
Tip Shape Round
Tubing Diameter (in) 3
Tubing Material 409S Stainless Steel

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