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Flowmaster 817104 - American Thunder Header Back Exhaust System

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$707.95

$786.95

You save: $79.00 (10%) off MSRP

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  1. 1974 Pontiac Firebird 5.7L V8 cid:350 cc:5733
  2. 1974 Pontiac Firebird 5.7L V8 cid:350
  3. 1974 Chevrolet Nova 5.7L V8 cid:350
  4. 1974 Chevrolet Camaro LT 5.7L V8 cid:350
  5. 1974 Chevrolet Camaro Base 5.7L V8 cid:350
  6. 1973 Pontiac GTO 7.5L V8 cid:455 cc:7456
  7. 1973 Pontiac GTO 6.6L V8 cid:400
  8. 1973 Chevrolet Camaro 5.7L V8 cid:350
  9. 1973 Pontiac GTO 6.6L V8 cid:400 cc:6555
  10. 1973 Pontiac Firebird 5.7L V8 cid:350 cc:5733
  11. 1973 Pontiac Firebird 5.7L V8 cid:350
  12. 1973 Chevrolet Nova 5.7L V8 cid:350
  13. 1973 Chevrolet Nova 5.0L V8 cid:307 cc:5031
  14. 1973 Chevrolet Camaro 5.0L V8 cid:307
  15. 1973 Chevrolet Nova 5.0L V8 cid:307
  16. 1973 Pontiac GTO 7.5L V8 cid:455
  17. 1973 Chevrolet Camaro 5.0L V8 cid:307 cc:5031
  18. 1972 Chevrolet Nova 5.0L V8 cid:307 cc:5031
  19. 1972 Chevrolet Nova 5.7L V8 cid:350
  20. 1972 Chevrolet Nova 5.0L V8 cid:307
  21. 1972 Chevrolet Camaro 6.6L V8 cid:402 cc:6588
  22. 1972 Chevrolet Camaro 5.7L V8 cid:350
  23. 1972 Pontiac Firebird 5.7L V8 cid:350
  24. 1972 Chevrolet Camaro 5.0L V8 cid:307 cc:5031
  25. 1972 Chevrolet Camaro 5.0L V8 cid:307
  26. 1972 Pontiac Firebird 5.7L V8 cid:350 cc:5733
  27. 1971 Pontiac Firebird Base 5.7L V8 cid:350
  28. 1971 Pontiac Firebird Base 5.7L V8 cid:350 cc:5733
  29. 1971 Chevrolet Camaro 5.0L V8 cid:307 cc:5031
  30. 1971 Chevrolet Camaro 5.0L V8 cid:307
  31. 1971 Chevrolet Nova 5.0L V8 cid:307 cc:5031
  32. 1971 Chevrolet Nova 5.0L V8 cid:307
  33. 1971 Chevrolet Camaro 6.6L V8 cid:402 cc:6588
  34. 1971 Chevrolet Camaro 5.7L V8 cid:350
  35. 1971 Chevrolet Nova 5.7L V8 cid:350
  36. 1970 Pontiac Firebird Base 6.6L V8 cid:400 cc:6555
  37. 1970 Chevrolet Nova 5.0L V8 cid:307 cc:5031
  38. 1970 Chevrolet Nova 5.7L V8 cid:350
  39. 1970 Chevrolet Camaro 5.0L V8 cid:307
  40. 1970 Chevrolet Camaro 5.0L V8 cid:307 cc:5031
  41. 1970 Chevrolet Camaro 5.7L V8 cid:350
  42. 1970 Chevrolet Camaro 6.6L V8 cid:402 cc:6588
  43. 1970 Chevrolet Nova 5.0L V8 cid:307
  44. 1970 Chevrolet Nova 6.5L V8 cid:396
  45. 1970 Chevrolet Nova 6.6L V8 cid:402 cc:6588
  46. 1970 Pontiac Firebird Base 5.7L V8 cid:350
  47. 1970 Pontiac Firebird Base 5.7L V8 cid:350 cc:5733
  48. 1970 Pontiac Firebird Base 6.6L V8 cid:400
  49. 1969 Chevrolet Camaro SS 5.7L V8 cid:350
  50. 1969 Chevrolet Camaro SS 6.5L V8 cid:396 cc:6489
  51. 1969 Chevrolet Nova 5.0L V8 cid:307
  52. 1969 Chevrolet Camaro RS 5.3L V8 cid:327 cc:5358
  53. 1969 Chevrolet Camaro RS 5.4L V8 cid:327
  54. 1969 Pontiac Firebird Base 5.7L V8 cid:350 cc:5733
  55. 1969 Pontiac Firebird Base 6.6L V8 cid:400
  56. 1969 Pontiac Firebird Base 6.6L V8 cid:400 cc:6555
  57. 1969 Pontiac Firebird Trans Am 6.6L V8 cid:400
  58. 1969 Chevrolet Camaro Base 5.3L V8 cid:327 cc:5358
  59. 1969 Pontiac Firebird Trans Am 6.6L V8 cid:400 cc:6555
  60. 1969 Chevrolet Camaro Base 5.4L V8 cid:327
  61. 1969 Pontiac Firebird 350 5.7L V8 cid:350
  62. 1969 Pontiac Firebird 350 HO 5.7L V8 cid:350
  63. 1969 Pontiac Firebird 400 6.6L V8 cid:400
  64. 1969 Pontiac Firebird Base 5.7L V8 cid:350
  65. 1969 Chevrolet Nova 5.0L V8 cid:307 cc:5031
  66. 1969 Chevrolet Nova 5.7L V8 cid:350
  67. 1969 Chevrolet Nova 6.5L V8 cid:396
  68. 1969 Chevrolet Nova 6.5L V8 cid:396 cc:6489
  69. 1969 Chevrolet Camaro RS 5.7L V8 cid:350
  70. 1969 Chevrolet Camaro Base 5.7L V8 cid:350
  71. 1968 Pontiac Firebird 350 5.7L V8 cid:350
  72. 1968 Pontiac Firebird Base 6.6L V8 cid:400 cc:6555
  73. 1968 Chevrolet Camaro SS 5.7L V8 cid:350
  74. 1968 Chevrolet Camaro RS 5.4L V8 cid:327
  75. 1968 Chevrolet Camaro RS 5.3L V8 cid:327 cc:5358
  76. 1968 Chevrolet Camaro Base 5.4L V8 cid:327
  77. 1968 Chevrolet Camaro Base 5.3L V8 cid:327 cc:5358
  78. 1968 Chevrolet Camaro SS 6.5L V8 cid:396 cc:6489
  79. 1968 Chevrolet Chevy II 6.5L V8 cid:396 cc:6489
  80. 1968 Chevrolet Camaro SS 6.5L V8 cid:396
  81. 1968 Pontiac Firebird 400 6.6L V8 cid:400
  82. 1968 Pontiac Firebird Base 5.7L V8 cid:350
  83. 1968 Chevrolet Chevy II 5.3L V8 cid:327 cc:5358
  84. 1968 Chevrolet Chevy II 5.4L V8 cid:327
  85. 1968 Chevrolet Chevy II 5.7L V8 cid:350
  86. 1968 Chevrolet Chevy II 6.5L V8 cid:396
  87. 1968 Pontiac Firebird Base 5.7L V8 cid:350 cc:5733
  88. 1968 Pontiac Firebird Base 6.6L V8 cid:400
  89. 1967 Pontiac Firebird Base 6.6L V8 cid:400
  90. 1967 Pontiac Firebird 400 6.6L V8 cid:400
  91. 1967 Chevrolet Camaro 5.7L V8 cid:350
  92. 1967 Chevrolet Camaro 5.3L V8 cid:327 cc:5358
  93. 1967 Chevrolet Camaro 4.9L V8 cid:302 cc:4949
  94. 1967 Pontiac Firebird HO 6.6L V8 cid:400
  95. 1967 Pontiac Firebird Base 6.6L V8 cid:400 cc:6555
  96. 1967 Chevrolet Camaro 6.5L V8 cid:396 cc:6489
  97. show all...
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About this product

Part #: 817104

For the person who is looking for a complete Header-back dual exhaust system. These systems are mandrel bent for maximum performance and include specially selected mufflers. This American Thunder system delivers a moderate interior and exterior tone and 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, these systems include all necessary parts and hardware for easy installation.

More Details

Exhaust SeriesAmerican Thunder
Exhaust TypeDual
Exit PositionDual Rear
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.500 in.
Inlet Inside Diameter2.500 in.
MaterialStainless Steel
Muffler Count1
Muffler Part NumberKit Only
Muffler Series80 Series Crossflow
Outlet Diameter2.500 in.
Outlet Outside Diameter2.500 in.
Single or DualDual
Sound LevelModerate
System TypeHeader Back
Tail Pipe Diameter2.500 in.
Tip Quantity0
TitleFlowmaster 817104 Header-back System 409S - Dual Rear Exit - American Thunder - Moderate 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 was looking for a certain sound, and this delivered!
Is this your first time buying from this brand? Did you consider other brands?
Yes, first time.
View on Logan'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?
Wanted a great sound from the mild 355 motor and were affordable for the custom exhaust I built.
Is this your first time buying from this brand? Did you consider other brands?
yes
View on Alex'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?
was already on car but is alright for what it is
Is this your first time buying from this brand? Did you consider other brands?
no
Was it easy to install? Any installation tips that will help others?
Was welded on when got just take exhaust to shops they can weld better than you.
Once you've had a chance to use the product, did it meet your expectations?
Its fine but I wish it was a bit louder
Any additional comments?
buy corsa
View on Chance'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?
I didnt want it to be obnoxious because It was my daily. Sounds good.
Is this your first time buying from this brand? Did you consider other brands?
Yes, Flowmaster is high quality. I did consider the 40 series.
View on Sergio'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?
it was a gift for high school graduation from my uncle, i've been wanting a flowmaster for quite some time, so finally having one made me happy.
Is this your first time buying from this brand? Did you consider other brands?
yes, having never put an exhaust on any car that i or my family has owned, flowmaster had the best sound to make my 4.0 more noisy without being obnoxious
Was it easy to install? Any installation tips that will help others?
did require cutting and welding
View on Jordan'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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