Get Dialed 4 The Spring & Save Up To $550 | SHOP NOW

MENU
SEARCH
STORES
CALL US
CART 0
    5. Flowmaster American Thunder Exhaust Systems

    Flowmaster American Thunder Exhaust Systems

    Flowmaster Exhaust
    Flowmaster American Thunder Exhaust Systems
    ##Sku-section1 ends2# 17:04:946##

    Features

    • Mandrel bent 16 Gauge Tubing
    • Moderate Sound exterior exhaust tone
    • Includes hangers and hardware for easy installation
    • Dyno tuned for maximum performance
    • California Residents: WARNING

    PRODUCT OVERVIEW

    The classic sound of a Flowmaster chambered exhaust, our American Thunder Series features mufflers tuned to deliver more power, torque, throttle response and mileage. Best of all, these exhaust systems take sedate vehicles and delivers a deep aggressive tone.

    Reviews

    4.5
    4.5 112
    4 Reviews
    Write a Review
    5.0
    2015 JKU

    The exhaust sounds great. The install took less than one hour. However, the removal of your old exhaust sucks. Take my advice: take your keep to a muffler shop and have them remove it. It’s not worth the time and effort to remove yourself. Reuse the rubber hangers. A couple of YouTube videos make the install easy.


    from St. Cloud, FL |
    3.0
    Installed on 2014 JK Rubicon X

    So I installed this on a 2014 JKRX about a month ago and I have been waiting to post a review. The sound and ground clearance is awesome! My mileage has dropped 2 - 4 MPG and I am not driving it with a heavy foot due to the better sound of this system over stock. The install took way too long as it seemed that I was the first person (according to Flowmaster tech support) which struggled with a two-door install. I ended up cutting 1.75" off of the first pipe connected to the stock y-pipe to make it fit. The 3/4" clearance recommended by flowmaster is very difficult to achieve over the rear sway bar and below the body at the rear axle


    from Denver, CO |
    5.0
    Great System

    Hardest part about putting this system on was getting the stock system off. Eventually had to chop it off with the sazall after trying for 2 hours to save it. Even with only 8k miles on a brand new truck it was still a major pain. System went on in about 30 minutes or so. We dry fit it all before tightening the clamps. Everything fit perfect, only thing that was weird was you had to cut down one section of pipe for your type of body style. Tips were perfectly level and came out in the exact same spot on each side. Sound is perfect for me. Nice and throaty down low and at idle with a raspy sound in the upper RPMs but is nice and quiet on the highway with just a little bit of drone if you are going over 65. This was installed on a '12 Ram Power Wagon and it fit with no issues.


    from Wayland, MO |
    5.0
    A+

    This exhaust system is amazing on my 2003 5.3l chevy tahoe. It looks great, sounds great, and functions perfectly. For the price, you can't beat it. GREAT VALUE


    from Hopewell NJ |
    See all reviews

    Question & Answers

    13 Answered questions

    Hello, I have a 2011 GMC Sierra 2500HD with the 6.0 L gas engine. I am just curious if my spare tire location will interfere with the American Thunder Cat Back Exhaust System by Flowmaster?

    Asked by Rimbilly from Rimbey AB on

    Hello Rimbilly, The Flowmaster Exhaust American Thunder Cat Back Exhaust System will not interfere with the factory spare tire location. Thank you.

    Answered by from Rimbey AB on

    Can you get a Black tip for this exhaust?

    Asked by Paul from Morrisville, NC on

    Hello Paul and thank you for your question! Flowmaster Exhaust American Thunder Cat Back Exhaust System will take a black tip in either flat or gloss black.

    Answered by Nick from Morrisville, NC on

    Can you get a Black tip for this exhaust?

    Asked by Paul from Morrisville, NC on

    Thanks for the inquiry Paul, the Flowmaster Exhaust American Thunder Cat Back Exhaust System part # FLW817674 unfortunately a black tip is not an option.

    Answered by from Morrisville, NC on

    See all questions & answers

    Manufacturer

    For over 30 years, Flowmaster has been producing exhaust products to combat noise issues that first cropped up on race tracks in California. The question was how to reduce sound without compromising performance? Advanced engineering and ample testing set Flowmaster's product line apart from competitors and a few of their more noteworthy parts include chambered mufflers, laminar flow designs and high flow catalytic converters. We carry Jeep exhaust pipes, exhaust flanges and complete exhaust systems among other Flowmaster products. The company's patented technologies, innovative designs and focus on performance keep Flowmaster at the forefront of aftermarket exhaust manufacturers. Shop Flowmaster Exhaust Now