axle-back

Flowmaster 817588 - American Thunder Axle Back Exhaust System

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Ships by 02/08/2023
SELECT YOUR VEHICLE

This part fits

  1. 2014 Ford Mustang GT 5.0L V8 cid:302 cc:4951
  2. 2013 Ford Mustang GT 5.0L V8 cid:302 cc:4951
Authorized Dealer

About this product

Part #: 817588

American Thunder exhaust systems deliver the aggressive sounds you want, as well as the performance gains you demand. This T409 stainless steel American Thunder Axle-back for the 2013 to 2014 Mustang GT features specially modified Super 44 series mufflers with polished 4.00 in. stainless tips and is a direct bolt on for the restyled Mustang. A lifetime limited warranty provides assurance that this American made exhaust will deliver that famous Flowmaster sound for many years to come.

More Details

Exhaust SeriesAmerican Thunder
Exhaust TypeDual
Exit PositionDual Rear
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.750 in.
Inlet Inside Diameter3.000 in.
MaterialStainless Steel
Muffler Count2
Muffler Part NumberKit Only
Muffler SeriesSuper 44 Series
Outlet Diameter3.000 in.
Outlet Outside Diameter4.000 in.
Single or DualDual
Sound LevelAggressive
System TypeAxle Back
Tail Pipe Diameter3.000 in.
Tip Diameter4.000 in.
Tip Quantity2
TitleFlowmaster 817588 Axle-back System 409S - Dual Rear Exit - American Thunder - Aggressive Sound
Tubing Diameter3.000 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?
Sound and quality
What were you trying to accomplish by adding this product?
Louder
Was it easy install? Any installation tips that will help others?
Professionally installed
Once you’ve had a chance to use the product, did it meet your expectations?
Yes
View on Justin'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
Johnathan Hirt

15

Johnathan Hirt
2015 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?
Price
What were you trying to accomplish by adding this product?
Better sound
Once you’ve had a chance to use the product, did it meet your expectations?
Good for the price
View on Johnathan's build
Trace Butcher

595

Trace Butcher
1979 Ford F-150
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
What were you trying to accomplish by adding this product?
Sound
View on Trace's build
Christian Larsen

23

Christian Larsen
2015 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
Once you’ve had a chance to use the product, did it meet your expectations?
It sounds good, but drones a lot when on the highway.
Any additional comments?
Probably going to run a Borla Stinger S-Type soon.
View on Christian'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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