axle-back

Flowmaster 817749 - American Thunder Axle Back Exhaust System

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$621.95

$691.95

You save: $70.00 (10%) off MSRP

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This part fits

  1. 2017 Ford Mustang GT 5.0L V8 cid:302 cc:4951
  2. 2017 Ford Mustang GT Premium 5.0L V8 cid:302 cc:4951
  3. 2016 Ford Mustang GT 5.0L V8 cid:302 cc:4951
  4. 2016 Ford Mustang GT Premium 5.0L V8 cid:302 cc:4951 Convertible
  5. 2016 Ford Mustang GT Premium 5.0L V8 cid:302 cc:4951 Coupe
  6. 2015 Ford Mustang GT 5.0L V8 cid:302 cc:4951
  7. 2015 Ford Mustang GT 50 Years Limited Edition 5.0L V8 cid:302 cc:4951
  8. 2015 Ford Mustang GT Premium 5.0L V8 cid:302 cc:4951 Convertible
Authorized Dealer

About this product

Part #: 817749

Flowmaster's American Thunder Axle-back exhaust system for the 2015-2017 Ford Mustang GT is perfect for the person looking for an aggressive sound level both inside and outside of the car, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOR (Dual Out Rear) emissions-legal system for cars with the 5.0L engine features a pair of Super 44 Series mufflers and dual mandrel bent 3.00in tailpipes for maximum performance. The system is built out of 409S stainless steel and utilizes 4.00in stainless steel tips. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: This system fits hardtops and convertibles.

More Details

Catalytic Converter IncludedNo
ColorBlack
Exhaust TypeDual
Exit PositionDual Rear
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.500 in.
Inlet Inside Diameter3.000 in.
MaterialStainless Steel
Mount TypeFlanged
Muffler Count2
Muffler Part NumberKit Only
Muffler SeriesSuper 44
Muffler TypeWelded Baffle
Outlet Diameter3.000 in.
Outlet Outside Diameter3.000 in.
ShapeOval
Single or DualDual
Sound LevelModerate/Aggressive
Tip CutAngle
Tip Diameter4.000 in.
Tip FinishPolished
Tip LogoEmbossed
Tip MaterialStainless Steel
Tip Quantity2
Tip ShapeRound
Tip TypeDouble Wall
TitleFlowmaster 817749 Axle-back System - 409S - Dual Rear Exit - American Thunder - Mod/Agg Sound
Tubing Diameter3.000 in.
Tubing MaterialStainless Steel
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?
quality
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?
chop/swap with the 50s series muffler. slightly more forward for location. local muffler shop did the work
Once you've had a chance to use the product, did it meet your expectations?
yes
Any additional comments?
the 50s series was not enough to control interior resonance between 1500-1900 rpm. I think the combination of the long tube header, resonator removal and over larger pipe diameter collectively contributed. It is much much better now, I would say the ideal combo for a full exhaust option (not a dual setup). The additional baffling and size of the 70 series absolutely did not remove any of the performance gains already experienced. So no worries there.
View on Adm's build
Devin Telschow

41

Devin Telschow
2008 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?
I wanted to make my car a bit louder without breaking the bank
Is this your first time buying from this brand? Did you consider other brands?
Yes
Was it easy to install? Any installation tips that will help others?
It was super easy. The install required only handheld tools and about an hours worth of time.
Once you've had a chance to use the product, did it meet your expectations?
It exceeded my expectations and provided a really nice sound.
View on Devin'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?
Deeper louder tone
Is this your first time buying from this brand? Did you consider other brands?
no, but i did consider Borla but was too quiet
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?
Sound clips sourced from YouTube
Is this your first time buying from this brand? Did you consider other brands?
Yes, I also considered a Cherry Bomb, Magnaflow, Banks, etc.
View on Drew'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 $40 why not
View on Dalton'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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