Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win A 2018 RTR Spec 3 Mustang Enter Now!

Flowmaster American Thunder Classic Axle-Back Exhaust w/ Quad Tips (13-14 GT500)

Market Price $742.99 You Save 10% ($74.60)
Our Price


FREE Shipping
  • Item 102116
  • MPN# 817612

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
In Stock Ships same business day.
Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Choose options to add to cart
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Aggressive Flowmaster Classic 40 Series Sound
    • Polished Stainless Steel 3.5" Quad Tips
    • Durable 409 Stainless Steel Construction
    • Includes Two Flowmaster Mufflers
    • Direct Fit Replacement Upgrade
    • Made in the USA
    • Fits 2013-2014 Shelby GT500 Mustangs
    Classic Flowmaster Sound. Give your 2013-2014 Shelby GT500 that unmistakable Flowmaster sound with a nice power boost with the American Thunder Axle-Back exhaust system. This system improves exhaust flow using Flowmaster's patented chambered muffler design for that throaty, aggressive exhaust tone your high powered Pony deserves.

    Quality Construction. Made in the USA from durable 3" 409 stainless steel tubing for its resistance to corrosion, the Flowmaster axle back features two oval chambered Classic 40 Series Flowmaster mufflers with 3.5" diameter polished stainless steel quad tips for great muscle car looks and sound. As an added bonus the tip is embossed with the "Flowmaster" logo for true custom styling.

    Direct Fit Upgrade. This Flowmaster American Thunder Classic Axle-Back Exhaust includes all the hangers and clamps needed to bolt  up in the stock location without any modifications required, making it a direct fit replacement upgrade.

    Application. This Flowmaster American Thunder Axle-Back exhaust system is designed to fit the 2013-2014 Shelby GT500 models equipped with the supercharged 5.8L DOHC 32-valve V8 engine.

    Fitment: 2013 2014 Details

    What's in the Box
    • (1) Left Muffler
    • (1) Right Muffler
    • (4) Stainless Tips
    • (4) 2½” Band Clamps
    • (2) 3/8” Hanger Keepers
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished 409 Stainless Steel
    Piping Size: 3" Tip Size: 3.5" quad tips
    Muffler Type: Chambered Fitment: 2013-2014 Shelby GT500
    Will it fit my Mustang?
    • GT500 - 13, 14

    Customer Photos (1) Submit Your Photo

    View 1 Photo

    You Might Also Like

    Q & A

    No questions about this product yet.

    Ask the First Question

    More Products You Might Like

    Customer Reviews (1) Write a Review

    Overall Rating 4.0

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Loudness / Volume 3 3
    • Exhaust Note 4 4
    • Fit & Finish 4 4
    • Bang For Your Buck 3 3

    • 4/5

      Installation Time: Less than 1 Hour

      June 04, 2014

      Brutally loud if you have an offroad midpipe. Subtle otherwise.

      Pro's: Easy to install. Lightweight compared to stock mufflers. Offer a unique exhaust tone. Con's (personal opinion): With my offroad H-pipe these mufflers were brutally loud & popped a LOT during downshifting. The exhaust tips look a bit small on the car. The tips are also 'unique' looking...some will like, some won't. Personally, if I keep this setup I'll definitely replace the tips with something else. Other: I felt the overall loudness of these mufflers with stock manifolds and midpipe was similar to the stock mufflers. However it does provide a unique, deeper tone and less of the 'burble' effect the stock gt500 mufflers produce. Note: You'll need a 16mm socket for the tip clamps (it's not mentioned in the installation instructions)


      Year: 2013 Submodel: GT500 South Carolina

      Helpful (2)

    Related Mustang Categories