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Flowmaster 817412 - American Thunder Header Back Exhaust System

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$622.95

$692.95

You save: $70.00 (10%) off MSRP

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This part fits

  1. 1967 Chevrolet Chevelle 4.6L V8 cid:283
  2. 1967 Pontiac GTO 6.6L V8 cid:400
  3. 1967 Oldsmobile F85 5.4L V8 cid:330 cc:5409
  4. 1967 Chevrolet Chevelle 5.3L V8 cid:327 cc:5358
  5. 1967 Chevrolet Chevelle 6.5L V8 cid:396 cc:6489
  6. 1967 Chevrolet Chevelle 6.5L V8 cid:396
  7. 1967 Chevrolet Chevelle 5.4L V8 cid:327
  8. 1967 Chevrolet Chevelle 4.6L V8 cid:283 cc:4638
  9. 1967 Oldsmobile Vista Cruiser
  10. 1967 Pontiac GTO 6.6L V8 cid:400 cc:6555
  11. 1967 Pontiac LeMans 5.3L V8 cid:326 cc:5343
  12. 1967 Buick Special 4.9L V8 cid:300 cc:4917
  13. 1967 Buick Skylark 6.6L V8 cid:400 cc:6555
  14. 1967 Buick Skylark 5.6L V8 cid:340 cc:5573
  15. 1967 Buick Skylark 4.9L V8 cid:300 cc:4917
  16. 1967 Buick Gran Sport 6.6L V8 cid:400 cc:6555
  17. 1967 Buick Gran Sport 5.6L V8 cid:340 cc:5573
  18. 1966 Chevrolet Chevelle SS 6.5L V8 cid:396 cc:6489
  19. 1966 Oldsmobile F85 5.4L V8 cid:330
  20. 1966 Chevrolet Chevelle Base 5.3L V8 cid:327 cc:5358
  21. 1966 Buick Gran Sport 6.6L V8 cid:401 cc:6572
  22. 1966 Buick Skylark 4.9L V8 cid:300 cc:4917
  23. 1966 Buick Skylark 5.6L V8 cid:340 cc:5573
  24. 1966 Buick Skylark 6.6L V8 cid:401 cc:6572
  25. 1966 Oldsmobile F85 5.4L V8 cid:330 cc:5409
  26. 1966 Oldsmobile Vista Cruiser
  27. 1966 Pontiac GTO 6.4L V8 cid:389 cc:6376
  28. 1966 Buick Special 4.9L V8 cid:300 cc:4917
  29. 1966 Pontiac LeMans 5.3L V8 cid:326 cc:5343
  30. 1966 Chevrolet Chevelle Base 4.6L V8 cid:283 cc:4638
  31. 1966 Chevrolet Chevelle Deluxe 4.6L V8 cid:283
  32. 1966 Chevrolet Chevelle SS 6.5L V8 cid:396
  33. 1965 Oldsmobile F85 5.4L V8 cid:330
  34. 1965 Oldsmobile F85 5.4L V8 cid:330 cc:5409
  35. 1965 Buick Skylark 4.9L V8 cid:300 cc:4917
  36. 1965 Buick Skylark 6.6L V8 cid:401 cc:6572
  37. 1965 Chevrolet Chevelle 4.6L V8 cid:283 cc:4638
  38. 1965 Chevrolet Chevelle 4.6L V8 cid:283
  39. 1965 Buick Special 4.9L V8 cid:300 cc:4917
  40. 1965 Buick Gran Sport 6.6L V8 cid:401 cc:6572
  41. 1965 Chevrolet Chevelle 6.5L V8 cid:396 cc:6489
  42. 1965 Chevrolet Chevelle 5.4L V8 cid:327
  43. 1965 Chevrolet Chevelle 5.3L V8 cid:327 cc:5358
  44. 1965 Pontiac LeMans 5.3L V8 cid:326 cc:5343
  45. 1965 Pontiac GTO 6.4L V8 cid:389 cc:6376
  46. 1965 Oldsmobile Vista Cruiser
  47. 1964 Oldsmobile Vista Cruiser
  48. 1964 Pontiac LeMans 5.3L V8 cid:326 cc:5343
  49. 1964 Chevrolet Chevelle Base 5.3L V8 cid:327 cc:5358
  50. 1964 Pontiac GTO 6.4L V8 cid:389 cc:6376
  51. 1964 Chevrolet Chevelle Base 4.6L V8 cid:283 cc:4638
  52. 1964 Oldsmobile F85 5.4L V8 cid:330 cc:5409
  53. 1964 Oldsmobile F85 5.4L V8 cid:330
  54. 1964 Buick Special 4.9L V8 cid:300 cc:4917
  55. 1964 Buick Skylark 4.9L V8 cid:300 cc:4917
  56. show all...
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About this product

Part #: 817412

For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are 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, these systems include all necessary parts and hardware for easy installation.

More Details

Exhaust SeriesAmerican Thunder
Exhaust TypeDual
Exit PositionDual Side
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.500 in.
MaterialStainless Steel
Muffler Count2
Muffler Part NumberKit Only
Muffler SeriesSuper 40 Series
Outlet Diameter2.500 in.
Outlet Outside Diameter3.000 in.
Single or DualDual
Sound LevelAggressive
System TypeHeader Back
Tail Pipe Diameter2.500 in.
Tip Quantity0
TitleFlowmaster 817412 Header-back System 409S - Dual Side Exit - American Thunder - Aggressive Sound
Tubing Diameter2.500 in.
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

See what our community says about flowmaster products

product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
I honestly like it really gives the truck a new sound and wakes it up some
View on Wadie's build
Timothy Moore

1.4k

Timothy Moore
2001 Volvo S60
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Coming soon!
What were you trying to accomplish by adding this product?
Coming soon!
Was it easy install? Any installation tips that will help others?
Coming soon!
Once you’ve had a chance to use the product, did it meet your expectations?
Coming soon!
Any additional comments?
Coming soon!
View on Timothy's build
Connor Martin

66

Connor Martin
2015 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
It sounded really good on the car
What were you trying to accomplish by adding this product?
Make the car more vocal but not obnoxious
Was it easy install? Any installation tips that will help others?
I paid someone to install it
Once you’ve had a chance to use the product, did it meet your expectations?
Yes it was worth every penny
Any additional comments?
Very deep sounding exhaust. 10/10 product
View on Connor's build
Gianfranco Estremadoyro

157

Gianfranco Estremadoyro
2009 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Loudest axlebacks in the market for the 3V with out compromising the "muscle car" sound.
What were you trying to accomplish by adding this product?
Make my car louder.
Was it easy install? Any installation tips that will help others?
Install was easy to do with the car lifted on ramps in my driveway.
Once you’ve had a chance to use the product, did it meet your expectations?
Met all my expectations.
Any additional comments?
I absolutely love this axlebacks and would recommend them to any 3V owner.
View on Gianfranco's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Highly recommended and great sound.
What were you trying to accomplish by adding this product?
Improved sound over stock mufflers.
Was it easy install? Any installation tips that will help others?
Had them professionally installed also did a resonator delete.
View on Josh's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

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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