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Flowmaster 817425 - American Thunder Cat Back Exhaust System

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$812.95

$903.95

You save: $91.00 (10%) off MSRP

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  1. 2006 Toyota Tundra 4.7L V8 cid:285 cc:4663 74.7 in. bed
  2. 2006 Toyota Tundra 4.7L V8 cid:285 cc:4663 74.3 in. bed
  3. 2006 Toyota Tundra 4.7L V8 cid:285 cc:4663 98.2 in. bed
  4. 2005 Toyota Tundra 4.7L V8 cid:285 cc:4663 74.3 in. bed
  5. 2005 Toyota Tundra 4.7L V8 cid:285 cc:4663 98.2 in. bed
  6. 2005 Toyota Tundra 4.7L V8 cid:285 cc:4663 74.7 in. bed
  7. 2004 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 98.2 in. bed
  8. 2004 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 76.1 in. bed
  9. 2004 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 74.3 in. bed
  10. 2004 Toyota Tundra Limited 4.7L V8 cid:285 cc:4663 74.3 in. bed
  11. 2003 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 76.5 in. bed
  12. 2003 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 98.2 in. bed
  13. 2003 Toyota Tundra Limited 4.7L V8 cid:285 cc:4663 76.5 in. bed
  14. 2002 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 98.2 in. bed
  15. 2002 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 76.5 in. bed
  16. 2002 Toyota Tundra Limited 4.7L V8 cid:285 cc:4663 76.5 in. bed
  17. 2001 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 98.2 in. bed
  18. 2001 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 76.5 in. bed
  19. 2001 Toyota Tundra Limited 4.7L V8 cid:285 cc:4663 76.5 in. bed
  20. 2000 Toyota Tundra Limited 4.7L V8 cid:285 cc:4663 76.5 in. bed
  21. 2000 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 98.2 in. bed
  22. 2000 Toyota Tundra SR5 4.7L V8 cid:285 cc:4663 76.5 in. bed
  23. show all...
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About this product

Part #: 817425

For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. D.O.R./D.O.S. systems are the perfect choice, and include exit pipes for both dual out rear and dual out side configurations so that you can choose the one that fits your style. 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 TypeSingle
Exit PositionDual Out Side
Exit PositionDual Out Rear
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter3.000 in.
Inlet Inside Diameter2.500 in.
MaterialStainless Steel
Muffler Count1
Muffler Part NumberKit Only
Muffler SeriesSuper 50 Series
Outlet Diameter2.500 in.
Outlet Outside Diameter2.500 in.
Single or DualDual
Sound LevelModerate/Aggressive
System TypeCat Back
Tail Pipe Diameter2.500 in.
Tip Diameter3.000 in.
Tip Quantity2
TitleFlowmaster 817425 Cat-back System 409S-Dual Rear/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

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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
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What made you choose this particular product?
Super 40'soft sound amazing...but drone makes them not family or neighbour friendly.
Is this your first time buying from this brand? Did you consider other brands?
Yes. I have used magna flow in the past, better for longer drives but not as nasty sounding...and I mean nasty in a good way!
View on Brett's build
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What made you choose this particular product?
I already had the Flowmaster Axle Back to go with it.
Is this your first time buying from this brand? Did you consider other brands?
I have other parts from Flowmaster.
View on Matt's build
CeJay Innes-Mammen

371

CeJay Innes-Mammen
2006 Dodge Charger
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?
Prior experience with these mufflers on other HEMI's
Is this your first time buying from this brand? Did you consider other brands?
Long time patron
View on CeJay'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?
Got these for a deal of a GT in the local junkyard. Cheap and had everything I needed to fit to my car.
Is this your first time buying from this brand? Did you consider other brands?
Yes, but my dad has had Flowmasters before so between that and their excellent reputation I knew they were for me.
Was it easy to install? Any installation tips that will help others?
Somewhat difficult. Passenger side pipe would not go in the car even after loosening the shock mounts and letting it droop from the control arms. It had to be cut and welded in the car
Once you've had a chance to use the product, did it meet your expectations?
Yes, sounded excellent especially for a V6
View on Joey'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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