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Flowmaster 2005-2009 Ford Mustang American Thunder Axle Back Exhaust System 17421

Flowmaster 2005-2009 Ford Mustang American Thunder Axle Back Exhaust System 17421
Flowmaster 2005-2009 Ford Mustang American Thunder Axle Back Exhaust System 17421Flowmaster 2005-2009 Ford Mustang American Thunder Axle Back Exhaust System 17421
$605.99 ea
NEWARRIVING SOONEstimated Ship Date 10/26/2023 (If Ordered Today)113 available from HOLLEY PERFORMANCE PRODUCTS as of 10/04/2023
Model: 4005000
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
This aggressive sounding system is designed to replace the original rear mounted mufflers located behind the rear axle. With easy fit in mind, the system is mandrel bent for maximum performance and includes specially selected mufflers to support the performance image of the car. As an America Thunder system, it delivers an aggressive exterior tone with moderate interior sound level that is suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, the system includes all necessary parts and hardware for easy installation.
Features:
  • Mandrel Bent 16ga Aluminized Tubing
  • Moderate Exterior Exhaust Tone
  • Mild Exterior Exhaust Tone
  • Incl. Hangers and Hardware For Easy Installation
  • Connects After Factory Catalytic Converter
  • Dual Out Rear Exit
  • Dyno Tuned for Maximum Performance
  • Premium Flowmaster Quality
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
Installation Notes:
Fits 2005-2009 Ford Mustang with V6 engine, coupes and convertible models.

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
FM_Warranty_General.pdf88.58KB
NAFTA_COO-2013.pdf105.94KB
17421.pdf724.86KB
17421_instructions.pdf1.66MB

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 Base 2005 4.0L / 245 / V6 Single; Single Side Exit; 2.5 in. Outlet; 5x10 in. Muffler Assembly; 3.5 in. Rolled Edge Stainless Tip;50 State Legal / California Emissions Compliant
Ford Mustang Base 2006 4.0L / 245 / V6 Single; Single Side Exit; 2.5 in. Outlet; 5x10 in. Muffler Assembly; 3.5 in. Rolled Edge Stainless Tip;50 State Legal / California Emissions Compliant
Ford Mustang Base 2007 4.0L / 245 / V6 Single; Single Side Exit; 2.5 in. Outlet; 5x10 in. Muffler Assembly; 3.5 in. Rolled Edge Stainless Tip;50 State Legal / California Emissions Compliant
Ford Mustang Base 2008 4.0L / 245 / V6 Single; Single Side Exit; 2.5 in. Outlet; 5x10 in. Muffler Assembly; 3.5 in. Rolled Edge Stainless Tip;50 State Legal / California Emissions Compliant
Ford Mustang Base 2009 4.0L / 245 / V6 Single; Single Side Exit; 2.5 in. Outlet; 5x10 in. Muffler Assembly; 3.5 in. Rolled Edge Stainless Tip;50 State Legal / California Emissions Compliant

Specifications:

2WD/4WD 2WD
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Chemical Name 1 Nickel (Metallic)
California Proposition 65 Chemical Name 2 Chromium (hexavalent compounds)
California Proposition 65 Required Yes
Color Black
Emission Code 5
Exhaust Series American Thunder
Exhaust Type Single
Exit Position Single Rear
Exit Style Straight
Heat Shield No
Heat Shield Attached No
Inlet Diameter 2.500 in.
Inlet Diameter (in) 2.5
Inlet Inside Diameter N/A
Material Aluminized Steel
Muffler Count 1
Muffler Part Number Kit Only
Muffler Quantity 1
Muffler Series 60 Series Delta Flow
Outlet Diameter 2.500 in.
Outlet Diameter (in) 2.5
Outlet Outside Diameter 3.500 in.
Part Type Exhaust System Kit
Single Dual Single
Single or Dual Single
Sound Level Moderate
System Type Axle Back
Tail Pipe Diameter 2.500 in.
Tip Diameter 3.500 in.
Tip Diameter (in) 3.5
Tip Quantity 1
Tubing Diameter 2.500 in.
Tubing Diameter (in) 2.5
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm
Warranty Time 36 Months

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Flowmaster 2005-2009 Ford Mustang American Thunder Axle Back Exhaust System 17421:
Mustang Depot 2023