FLOWMASTER part description

Product Description

American Thunder Axle Back Exhaust System

Application Summary

Fits 2005 to 2009 Ford Mustang with a V6 engine; includes convertible models.

Features & Benefits

  • 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

Axle back; Exhaust; Kit; Ford; Mustang; V6; Performance

Product Attributes

Color Black
Exhaust Series American Thunder
Exhaust Type Single
Exit Position Single Rear
Exit Style Straight
Heat Shield Attached No
Inlet Diameter 2.500 in.
Inlet Inside Diameter N/A
Material Aluminized Steel
Muffler Count 1
Muffler Part Number Kit Only
Muffler Series 60 Series Delta Flow
Outlet Diameter 2.500 in.
Outlet Outside Diameter 3.500 in.
Single Or Dual Single
Sound Level Moderate
System Type Axle Back
Tail Pipe Diameter 2.500 in.
Tip Diameter 3.500 in.
Tip Quantity 1
Title Flowmaster 17421 Axle-back System 409S - Single Rear Exit - American Thunder - Moderate Sound
Tubing Diameter 2.500 in.

Additional Information

Country of Origin (Primary) US
Canadian Harmonizing Tariff Code 8708925000
Harmonized Tariff Code (Schedule B) 8708925000
Harmonized Tariff Code (HTS) 8708925000
MSDS Sheet Number N
NAFTA Preference Criterion Code B
Refurbished Part N
Remanufactured Part N
Stock Status S
Warranty Time 36
Warranty Time UOM MO
UPC 00700042020584

Part Interchanges

A brand under Holley Performance Products, an automotive performance company based in Bowling Green, Kentucky, Flowmaster® provides a broad selection of performance exhaust systems, air intakes, and mufflers. It also offers turbo boost modules, headers, race mufflers, and various exhaust accessories for trucks, off-road, SUVs, Jeeps, powersports vehicles, classic muscle cars, and other late model cars. For more than 30 years, Flowmaster has been delivering only the best automotive exhaust products to the market and living up to its name as “The Exhaust Technology Company.” Today, the company takes its mission statement a notch higher by offering exciting new product categories to enhance its exhaust products portfolio. It aims to be “The Performance Technology Company” automotive enthusiasts can trust.

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