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Flowmaster 17120 - American Thunder Header Back Exhaust System

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$599.95

$666.95

You save: $67.00 (10%) off MSRP

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  1. 1972 Chevrolet El Camino 5.0L V8 cid:307
  2. 1972 GMC Sprint 7.4L V8 cid:454
  3. 1972 GMC Sprint 7.4L V8 cid:454 cc:7439
  4. 1972 Chevrolet El Camino 6.6L V8 cid:400
  5. 1972 GMC Sprint 6.6L V8 cid:402 cc:6588
  6. 1972 GMC Sprint 6.6L V8 cid:400
  7. 1972 GMC Sprint 5.7L V8 cid:350
  8. 1972 GMC Sprint 5.0L V8 cid:307 cc:5031
  9. 1972 GMC Sprint 5.0L V8 cid:307
  10. 1972 GMC Sprint 4.1L L6 cid:250 cc:4098
  11. 1972 GMC Sprint 4.1L L6 cid:250 cc:4097
  12. 1972 Chevrolet El Camino 7.4L V8 cid:454 cc:7441
  13. 1972 Chevrolet El Camino 7.4L V8 cid:454 cc:7439
  14. 1972 Chevrolet El Camino 7.4L V8 cid:454
  15. 1972 Chevrolet El Camino 6.6L V8 cid:402 cc:6588
  16. 1972 Chevrolet El Camino 4.1L L6 cid:250
  17. 1972 Chevrolet El Camino 4.1L L6 cid:250 cc:4097
  18. 1972 Chevrolet El Camino 4.1L L6 cid:250 cc:4098
  19. 1972 GMC Sprint 7.4L V8 cid:454 cc:7441
  20. 1972 Chevrolet El Camino 5.0L V8 cid:307 cc:5031
  21. 1972 Chevrolet El Camino 5.7L V8 cid:350
  22. 1971 Chevrolet El Camino Base 4.1L L6 cid:250
  23. 1971 Chevrolet El Camino SS 6.6L V8 cid:400
  24. 1971 Chevrolet El Camino SS 7.4L V8 cid:454
  25. 1971 Chevrolet El Camino SS 7.4L V8 cid:454 cc:7439
  26. 1971 Chevrolet El Camino SS 7.4L V8 cid:454 cc:7441
  27. 1971 GMC Sprint
  28. 1971 Chevrolet El Camino Custom 5.0L V8 cid:307 cc:5031
  29. 1971 Chevrolet El Camino Custom 5.0L V8 cid:307
  30. 1971 Chevrolet El Camino Base 7.4L V8 cid:454 cc:7439
  31. 1971 Chevrolet El Camino Base 6.6L V8 cid:402 cc:6588
  32. 1971 Chevrolet El Camino Base 6.6L V8 cid:400
  33. 1971 Chevrolet El Camino SS 5.7L V8 cid:350
  34. 1971 Chevrolet El Camino SS 6.6L V8 cid:402 cc:6588
  35. 1971 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4097
  36. 1971 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4098
  37. 1971 Chevrolet El Camino Base 5.0L V8 cid:307
  38. 1971 Chevrolet El Camino Base 5.0L V8 cid:307 cc:5031
  39. 1971 Chevrolet El Camino Base 5.7L V8 cid:350
  40. 1971 Chevrolet El Camino Custom 5.7L V8 cid:350
  41. 1971 Chevrolet El Camino Custom 6.6L V8 cid:400
  42. 1971 Chevrolet El Camino Custom 6.6L V8 cid:402 cc:6588
  43. 1971 Chevrolet El Camino Custom 7.4L V8 cid:454
  44. 1971 Chevrolet El Camino Custom 7.4L V8 cid:454 cc:7439
  45. 1971 Chevrolet El Camino Custom 7.4L V8 cid:454 cc:7441
  46. 1970 Chevrolet El Camino Custom 5.0L V8 cid:307 cc:5031
  47. 1970 Chevrolet El Camino Custom 5.7L V8 cid:350
  48. 1970 Chevrolet El Camino Custom 6.6L V8 cid:400
  49. 1970 Chevrolet El Camino Custom 6.6L V8 cid:402 cc:6588
  50. 1970 Chevrolet El Camino Custom 7.4L V8 cid:454
  51. 1970 Chevrolet El Camino Custom 7.4L V8 cid:454 cc:7439
  52. 1970 Chevrolet El Camino Base 4.1L L6 cid:250
  53. 1970 Chevrolet El Camino SS 6.6L V8 cid:400
  54. 1970 Chevrolet El Camino SS 6.6L V8 cid:402 cc:6588
  55. 1970 Chevrolet El Camino SS 7.4L V8 cid:454
  56. 1970 Chevrolet El Camino Base 7.4L V8 cid:454 cc:7441
  57. 1970 Chevrolet El Camino SS 7.4L V8 cid:454 cc:7441
  58. 1970 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4097
  59. 1970 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4098
  60. 1970 Chevrolet El Camino Base 5.0L V8 cid:307
  61. 1970 Chevrolet El Camino Base 5.0L V8 cid:307 cc:5031
  62. 1970 Chevrolet El Camino Base 5.7L V8 cid:350
  63. 1970 Chevrolet El Camino Base 6.5L V8 cid:396
  64. 1970 Chevrolet El Camino SS 7.4L V8 cid:454 cc:7439
  65. 1970 Chevrolet El Camino Base 6.6L V8 cid:400
  66. 1970 Chevrolet El Camino Base 6.6L V8 cid:402 cc:6588
  67. 1970 Chevrolet El Camino Base 7.4L V8 cid:454
  68. 1970 Chevrolet El Camino Base 7.4L V8 cid:454 cc:7439
  69. 1970 Chevrolet El Camino Custom 7.4L V8 cid:454 cc:7441
  70. 1970 Chevrolet El Camino Custom 5.0L V8 cid:307
  71. 1969 Chevrolet El Camino Base 6.5L V8 cid:396
  72. 1969 Chevrolet El Camino Base 4.1L L6 cid:250
  73. 1969 Chevrolet El Camino SS 6.5L V8 cid:396
  74. 1969 Chevrolet El Camino Custom 5.7L V8 cid:350
  75. 1969 Chevrolet El Camino Custom 5.3L V8 cid:327 cc:5358
  76. 1969 Chevrolet El Camino Custom 5.0L V8 cid:307 cc:5031
  77. 1969 Chevrolet El Camino Custom 5.0L V8 cid:307
  78. 1969 Chevrolet El Camino Base 6.5L V8 cid:396 cc:6489
  79. 1969 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4098
  80. 1969 Chevrolet El Camino Base 5.7L V8 cid:350
  81. 1969 Chevrolet El Camino Base 5.3L V8 cid:327 cc:5358
  82. 1969 Chevrolet El Camino Base 5.0L V8 cid:307 cc:5031
  83. 1969 Chevrolet El Camino Base 5.0L V8 cid:307
  84. 1969 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4097
  85. 1969 Chevrolet El Camino SS 6.5L V8 cid:396 cc:6489
  86. 1969 Chevrolet El Camino Base 3.8L L6 cid:230 cc:3769
  87. 1969 Chevrolet El Camino Base 3.8L L6 cid:230
  88. 1968 Chevrolet El Camino Base 3.8L L6 cid:230 cc:3769
  89. 1968 Chevrolet El Camino Base 5.4L V8 cid:327
  90. 1968 Chevrolet El Camino Custom 5.7L V8 cid:350
  91. 1968 Chevrolet El Camino Custom 5.3L V8 cid:327 cc:5358
  92. 1968 Chevrolet El Camino Custom 5.0L V8 cid:307 cc:5031
  93. 1968 Chevrolet El Camino Custom 5.0L V8 cid:307
  94. 1968 Chevrolet El Camino Base 6.5L V8 cid:396 cc:6489
  95. 1968 Chevrolet El Camino Base 6.5L V8 cid:396
  96. 1968 Chevrolet El Camino Base 5.7L V8 cid:350
  97. 1968 Chevrolet El Camino Base 5.3L V8 cid:327 cc:5358
  98. 1968 Chevrolet El Camino Base 5.0L V8 cid:307 cc:5031
  99. 1968 Chevrolet El Camino Base 5.0L V8 cid:307
  100. 1968 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4098
  101. 1968 Chevrolet El Camino Base 4.1L L6 cid:250 cc:4097
  102. 1968 Chevrolet El Camino Base 4.1L L6 cid:250
  103. 1968 Chevrolet El Camino Base 3.8L L6 cid:230
  104. show all...
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About this product

Part #: 17120

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.
MaterialAluminized Steel
Muffler Count2
Muffler Part Number52558
Muffler SeriesSuper 50 Series
Outlet Diameter2.500 in.
Outlet Outside Diameter2.500 in.
Single or DualDual
Sound LevelModerate/Aggressive
System TypeHeader Back
Tail Pipe Diameter2.500 in.
Tip Diameter3.000 in.
Tip Quantity2
TitleFlowmaster 17120 Header-back System - Dual Side Exit - American Thunder - Moderate/Aggressive
Tubing Diameter2.500 in.
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

See what our community says about flowmaster products

Sam Jacobson

451

Sam Jacobson
2013 Dodge Dart
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 wanted a little more rumble from the car at idle.
What were you trying to accomplish by adding this product?
Have more idle, replaced the Flowmaster dBX muffler for the HP-2 Shorty.
Once you’ve had a chance to use the product, did it meet your expectations?
With resonated tips added at the same time, I have enjoyed the sound of my exhaust more than I ever have! When the car is cold my car's exhaust pops louder than ever and I love it! It is a muffler rated way higher on the Flowmaster exhaust chart!
View on Sam'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?
Price
What were you trying to accomplish by adding this product?
Lil more growl
Was it easy install? Any installation tips that will help others?
Professional
Once you’ve had a chance to use the product, did it meet your expectations?
Yes great healthy sound
View on Karl'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?
Cheap and effecfive. Won’t wear out.
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?
Cut out the old, clamped in the new.
Once you've had a chance to use the product, did it meet your expectations?
Works fine. Sounds decent.
View on Mason'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?
Performance and sound
What were you trying to accomplish by adding this product?
Power and sound
Once you’ve had a chance to use the product, did it meet your expectations?
Very happy with it. Car is very loud but with a nice deep tone.
View on Dakota'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?
the sound
What were you trying to accomplish by adding this product?
get rid of the crap mufflers on my pypes exhaust
View on Jacob'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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