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Flowmaster 817574 - American Thunder Cat Back Exhaust System

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$389.95

$433.95

You save: $44.00 (10%) off MSRP

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This part fits

  1. 2004 Ford Mustang GT 4.6L V8 cid:281
  2. 2004 Ford Mustang Mach I 4.6L V8 cid:281
  3. 2004 Ford Mustang SVT Cobra 4.6L V8 cid:281
  4. 2003 Ford Mustang GT 4.6L V8 cid:281
  5. 2003 Ford Mustang SVT Cobra 10th Anniversary 4.6L V8 cid:281
  6. 2003 Ford Mustang Mach I 4.6L V8 cid:281
  7. 2003 Ford Mustang SVT Cobra 4.6L V8 cid:281
  8. 2002 Ford Mustang GT 4.6L V8 cid:281
  9. 2001 Ford Mustang GT Bullitt 4.6L V8 cid:281
  10. 2001 Ford Mustang GT 4.6L V8 cid:281
  11. 2001 Ford Mustang SVT Cobra 4.6L V8 cid:281
  12. 2000 Ford Mustang GT 4.6L V8 cid:281
  13. 1999 Ford Mustang SVT Cobra 4.6L V8 cid:281
  14. 1999 Ford Mustang GT 4.6L V8 cid:281
  15. 1998 Ford Mustang GT 4.6L V8 cid:281
  16. 1998 Ford Mustang SVT Cobra 4.6L V8 cid:281
  17. 1997 Ford Mustang GT 4.6L V8 cid:281
  18. 1997 Ford Mustang SVT Cobra 4.6L V8 cid:281
  19. 1996 Ford Mustang SVT Cobra 4.6L V8 cid:281
  20. 1996 Ford Mustang GT 4.6L V8 cid:281
  21. 1995 Ford Mustang GTS 5.0L V8 cid:302
  22. 1995 Ford Mustang SVT Cobra 5.0L V8 cid:302
  23. 1995 Ford Mustang GT 5.0L V8 cid:302
  24. 1994 Ford Mustang SVT Cobra 5.0L V8 cid:302
  25. 1994 Ford Mustang GT 5.0L V8 cid:302
  26. 1993 Ford Mustang SVT Cobra 5.0L V8 cid:302
  27. 1993 Ford Mustang LX 5.0L V8 cid:302
  28. 1993 Ford Mustang GT 5.0L V8 cid:302
  29. 1993 Ford Mustang SVT Cobra R 5.0L V8 cid:302
  30. 1992 Ford Mustang LX 5.0L V8 cid:302
  31. 1992 Ford Mustang GT 5.0L V8 cid:302
  32. 1991 Ford Mustang LX 5.0L V8 cid:302
  33. 1991 Ford Mustang GT 5.0L V8 cid:302
  34. 1990 Ford Mustang LX 5.0L V8 cid:302
  35. 1990 Ford Mustang GT 5.0L V8 cid:302
  36. 1989 Ford Mustang GT 5.0L V8 cid:302
  37. 1989 Ford Mustang LX 5.0L V8 cid:302
  38. 1988 Ford Mustang GT 5.0L V8 cid:302
  39. 1988 Ford Mustang LX 5.0L V8 cid:302
  40. 1987 Ford Mustang LX 5.0L V8 cid:302
  41. 1987 Ford Mustang GT 5.0L V8 cid:302
  42. 1986 Ford Mustang LX 5.0L V8 cid:302
  43. 1986 Ford Mustang GT 5.0L V8 cid:302
  44. show all...
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About this product

Part #: 817574

Flowmaster's race-oriented American Thunder Extreme Cat-back system is designed to mount behind the factory catalytic converters, or most OEM style aftermarket H-pipes. The turn-down tailpipes drop at the rear of the transmission and eliminates full length tailpipes to maximize the sound level and allow for extra clearance for wide tires and modified suspensions.These systems are mandrel bent for maximum performance and include Super 44 series mufflers. This American Thunder Extreme system delivers a super aggressive interior and exterior tone and is suited to the enthusiast who wants the most aggressive components they can purchase. Like all Flowmaster systems, the benefits include improved throttle response and power. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

Install photos (1)

For the American Thunder Cat Back Exhaust System

More Details

ColorBlack Muffler; Natural Tubing
Exhaust SeriesAmerican Thunder
Exhaust TypeDual
Exit PositionDual Out Dumps
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.500 in.
Inlet Inside Diameter2.500 in.
MaterialStainless Steel
Muffler Count2
Muffler Part NumberKit Only
Muffler SeriesSuper 44 Series
Outlet Diameter2.500 in.
Outlet Outside Diameter2.500 in.
Single or DualDual
Sound LevelAggressive
System TypeCat Back
Tail Pipe Diameter2.500 in.
Tip Quantity0
TitleFlowmaster 817574 Cat-back System 409S - Dual Dump Exit - American Thunder - Aggressive Sound
Tubing Diameter2.500 in.
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

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California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

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About Flowmaster

Manufacturer of performance exhaust systems, mufflers, cold 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.

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