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Flowmaster 2015-2017 Ford Mustang Outlaw Cat-Back Exhaust System 817734

Flowmaster 2015-2017 Ford Mustang Outlaw Cat-Back Exhaust System 817734
Flowmaster 2015-2017 Ford Mustang Outlaw Cat-Back Exhaust System 817734Flowmaster 2015-2017 Ford Mustang Outlaw Cat-Back Exhaust System 817734Flowmaster 2015-2017 Ford Mustang Outlaw Cat-Back Exhaust System 817734
$2,134.99 ea
NEWARRIVING SOONEstimated Ship Date 04/17/2026 (If Ordered Today)8 Available from HOLLEY PERFORMANCE PRODUCTS as of 04/05/2026
Model: 4005437
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
OVERSIZE 3
STORE PICKUP
[More Info]
The Flowmaster Outlaw Cat-back exhaust system for 2015-2017 Ford Mustang GT with 5.0L engine is perfect for the person looking for a deep and very aggressive sound level inside and outside the car. This bolt-on emissions-legal system features our exclusive dual 3.00-inch Scavenger Series X-pipe for maximum power and a deep unique sound. The stainless steel X-pipe flows into a pair of our race proven Outlaw Series mufflers and exits into dual mandrel-bent 3.00-inch stainless steel tailpipes which are finished off with large 4.00-inch polished stainless steel tips. The system is designed for an easy fit and includes all necessary parts and hardware for an easy installation you can do at home. Covered by our Lifetime Limited Warranty. Note: Does Not fit convertibles.
Features:
  • Includes our Exclusive Scavenger Series X-pipe
  • Very Aggressive Interior & Exterior Sound
  • Uses the Factory Hanger Locations
  • Dyno Tuned For Maximum Power
  • Race-proven Outlaw Mufflers
  • Stainless Steel Construction
  • Lifetime Limited Warranty
Fits 2015-2017 Ford Mustang GT 5.0L Coupes. Does not fit Convertibles
Installation Notes:
Fits 2015-2017 Ford Mustang GT 5.0L Coupes. Does not fit Convertibles
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
817734.pdf376.39KB

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 Fitment Notes
Ford Mustang GT 50 Years Limited Edition 2015 5.0L / 302 / V8 Does Not Fit Convertible
Ford Mustang GT Premium 2015 5.0L / 302 / V8 Does Not Fit Convertible
Ford Mustang GT Premium 2016 5.0L / 302 / V8 Does Not Fit Convertible
Ford Mustang GT 2015 5.0L / 302 / V8 Does Not Fit Convertible
Ford Mustang GT 2016 5.0L / 302 / V8 Does Not Fit Convertible
Ford Mustang 2017 5.0L / 302 / V8

Specifications:

2WD/4WD RWD
California Proposition 65 Chemical Name Chromium (hexavalent compounds), Nickel (Metallic)
California Proposition 65 Required Yes
Catalytic Converter Included No
Color Black
Emission Code 5
Exhaust Series Outlaw
Exit Position Dual Out Rear
Heat Shield No
Inlet Diameter (in) 3
Material 409 Stainless Steel
Mount Type Flanged
Muffler Part Number Kit Only
Muffler Quantity 2
Muffler Series Outlaw
Muffler Type Welded Baffle
Outlet Diameter (in) 3
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Shape Round
Single Dual Dual
Sound Level Aggressive
System Type Cat-back
Tip Cut Angle
Tip Diameter (in) 4
Tip Edge Style Cut
Tip Finish Polished
Tip Length (in) 5.25
Tip Logo Embossed
Tip Material Stainless Steel
Tip Quantity 2
Tip Shape Round
Tubing Diameter (in) 3
Warranty Limited Lifetime (Lifetime)

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Flowmaster 2015-2017 Ford Mustang Outlaw Cat-Back Exhaust System 817734: