FLOWMASTER part description

Product Description

American Thunder Cat Back Exhaust System

Application Summary

Fits 1986 to 2004 Ford Mustang; GT; LX; and Cobra models with a 4.6L or 5.0L V8 engine.

Features & Benefits

  • Mandrel Bent Stainless Steel Tubing
  • Includes Hangers And Hardware For Easy Installation
  • Dyno Tuned for Maximum Performance
  • Premium Flowmaster Quality
  • 3 Year Limited Warranty
  • Made in the USA
  • Patented Delta Flow Technology

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

mustang exhaust; performance exhaust; extreme

Product Attributes

Color Black Muffler; Natural Tubing
Exhaust Series American Thunder
Exhaust Type Dual
Exit Position Dual Out Dumps
Exit Style Straight
Heat Shield Attached No
Inlet Diameter 2.500 in.
Inlet Inside Diameter 2.500 in.
Material Stainless Steel
Muffler Count 2
Muffler Part Number Kit Only
Muffler Series Super 44 Series
Outlet Diameter 2.500 in.
Outlet Outside Diameter 2.500 in.
Single Or Dual Dual
Sound Level Aggressive
System Type Cat Back
Tail Pipe Diameter 2.500 in.
Tip Diameter N/A
Tip Quantity 0
Title Flowmaster 817574 Cat-back System 409S - Dual Dump Exit - American Thunder - Aggressive Sound
Tubing Diameter 2.500 in.

Additional Information

Country of Origin (Primary) CN
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 Special Limited Lifetime
Warranty Special UOM LF
UPC 00700042026531

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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