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Flowmaster 817312 - American Thunder Cat Back Exhaust System

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$599.95

$666.95

You save: $67.00 (10%) off MSRP

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Flowmaster 817312 - American Thunder Cat Back Exhaust System

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. 2003 Ford Mustang GT 4.6L V8 cid:281
  4. 2003 Ford Mustang Mach I 4.6L V8 cid:281
  5. 2002 Ford Mustang GT 4.6L V8 cid:281
  6. 2001 Ford Mustang GT 4.6L V8 cid:281
  7. 2001 Ford Mustang GT Bullitt 4.6L V8 cid:281
  8. 2000 Ford Mustang GT 4.6L V8 cid:281
  9. 1999 Ford Mustang GT 4.6L V8 cid:281
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About this product

Part #: 817312

For the person who is looking for a complete Cat-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 Rear
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 Diameter2.500 in.
Single or DualDual
Sound LevelModerate
System TypeCat Back
Tail Pipe Diameter2.500 in.
Tip Diameter3.000 in.
Tip Quantity2
TitleFlowmaster 817312 Cat-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?
For the price it came with everything you need to change from an factory exhaust to dual exhaust.
Is this your first time buying from this brand? Did you consider other brands?
Yes, this was my first time buying this brand. I consider other brands.
Once you've had a chance to use the product, did it meet your expectations?
Good bang for your buck.
View on Deshawn's build
Michael Curbelo

290

Michael Curbelo
1988 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?
The way it sounds on the car and the reviews that it got is what sold me on buying it
Is this your first time buying from this brand? Did you consider other brands?
I’ve had this brand before but of different mufflers and I was considering getting SLP loudmouth bullet style mufflers
Was it easy to install? Any installation tips that will help others?
Was easy to install everything bolted right up
Once you've had a chance to use the product, did it meet your expectations?
It exceeded my expectations
View on Michael's build
Michael Caffrey

217

Michael Caffrey
2000 Chevrolet S-10
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 recommended by the installer
Is this your first time buying from this brand? Did you consider other brands?
Yes
View on Michael'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?
Its Flow master, so of course it sounds good and it doesn't have packing to wear out.
View on Cameron'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?
LIKE: Aggressive sound, Black muffler, qp Cold starts, Chrome tips DISLIKE: Not much to dislike LABOR: Did it myself INSTALLATION: Step by step instructions, NOTE: make sure you measure and mark before you cut off old exhaust, Took around 3 to 5 hours (took my time) PERFORMANCE: Deep aggressive sound, allows more air to flow. RECOMMEND: I would RECOMMEND for those who are comfortable cutting exhaust, but professional installation also encouraged if you arent up for the challenge.
View on Robert'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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