Special discount price: enter JUNE at checkout for 9% off. *
close promo banner icon

cat-back

Flowmaster - American Thunder Cat Back Exhaust System (817674)

rating-star review rating-star review 1rating-star review 2rating-star review 3rating-star review 4 (1)

$457.95

$508.95

You save: $51.00 (10%) off MSRP

stock messaging Out of StockOut of Stock
Order now to be added to the priority list
Check to see if this fits your vehicle

TOP MEMBER BUILDS RUNNING THIS MOD

Flowmaster - American Thunder Cat Back Exhaust System

This part fits

  1. 2018 Jeep Wrangler JK
  2. 2017 Jeep Wrangler
  3. 2016 Jeep Wrangler
  4. 2015 Jeep Wrangler
  5. 2014 Jeep Wrangler
  6. 2013 Jeep Wrangler
  7. 2012 Jeep Wrangler
  8. 2011 Jeep Wrangler 70th Anniversary 3.8L V6 cid:231 cc:3778
  9. 2011 Jeep Wrangler Rubicon 3.8L V6 cid:231 cc:3778
  10. 2011 Jeep Wrangler Sahara 3.8L V6 cid:231 cc:3778
  11. 2011 Jeep Wrangler Sport 3.8L V6 cid:231 cc:3778
  12. 2011 Jeep Wrangler Unlimited 70th Anniversary 3.8L V6 cid:231 cc:3778
  13. 2011 Jeep Wrangler Unlimited Rubicon 3.8L V6 cid:231 cc:3778
  14. 2011 Jeep Wrangler Unlimited Sahara 3.8L V6 cid:231 cc:3778
  15. 2011 Jeep Wrangler Unlimited Sport 3.8L V6 cid:231 cc:3778
  16. 2010 Jeep Wrangler
  17. 2009 Jeep Wrangler Unlimited Rubicon 3.8L V6 cid:231 cc:3778
  18. 2009 Jeep Wrangler X S 3.8L V6 cid:231 cc:3778
  19. 2009 Jeep Wrangler X 3.8L V6 cid:231 cc:3778
  20. 2009 Jeep Wrangler Rubicon 3.8L V6 cid:231 cc:3778
  21. 2009 Jeep Wrangler Unlimited X 3.8L V6 cid:231 cc:3778
  22. 2009 Jeep Wrangler Unlimited Sahara 3.8L V6 cid:231 cc:3778
  23. 2009 Jeep Wrangler Sahara 3.8L V6 cid:231 cc:3778
  24. 2008 Jeep Wrangler
  25. 2007 Jeep Wrangler
  26. show all...
Authorized Dealer

About this product

Part #: 817674

Flowmasters new American Thunder cat-back system for the 2007-2018 Jeep Wrangler JK is perfect for the person looking for maximum performance and ground clearance from their exhaust system. This 2.50" system features a 409S stainless steel mandrel bent tailpipe with a 3.00" polished stainless steel tip and fits both 2 and 4 door models with the 3.6L and 3.8L V6 engines. This system replaces the factory transverse muffler and relocates the Super HP-2 muffler behind the factory catalytic converter, providing a moderate to aggressive sound level. This relocation allows for better ground clearance when driving off-road. Because the tailpipe is tucked up so high, an aftermarket metal bumper is recommended. 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.

More Details

Exhaust SeriesAmerican Thunder
Exhaust TypeSingle
Exit PositionSingle Rear
Exit StyleTurn Down
Heat Shield AttachedNo
Inlet Diameter2.500 in.
Inlet Inside Diameter2.500 in.
MaterialStainless Steel
Muffler Count1
Muffler Part NumberKit Only
Muffler SeriesSuper HP-2
Outlet Diameter2.500 in.
Outlet Outside Diameter3.000 in.
Single or DualDual
Sound LevelModerate
System TypeCat Back
Tail Pipe Diameter2.500 in.
Tip Diameter3.000 in.
Tip Length3.750 in.
Tip Quantity1
TitleFlowmaster 817674 Cat-back System 409S - Single 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?
I was looking for a certain sound, and this delivered!
Is this your first time buying from this brand? Did you consider other brands?
Yes, first time.
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?
Wanted a great sound from the mild 355 motor and were affordable for the custom exhaust I built.
Is this your first time buying from this brand? Did you consider other brands?
yes
View on Alex'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?
was already on car but is alright for what it is
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?
Was welded on when got just take exhaust to shops they can weld better than you.
Once you've had a chance to use the product, did it meet your expectations?
Its fine but I wish it was a bit louder
Any additional comments?
buy corsa
View on Chance'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?
I didnt want it to be obnoxious because It was my daily. Sounds good.
Is this your first time buying from this brand? Did you consider other brands?
Yes, Flowmaster is high quality. I did consider the 40 series.
View on Sergio'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 a gift for high school graduation from my uncle, i've been wanting a flowmaster for quite some time, so finally having one made me happy.
Is this your first time buying from this brand? Did you consider other brands?
yes, having never put an exhaust on any car that i or my family has owned, flowmaster had the best sound to make my 4.0 more noisy without being obnoxious
Was it easy to install? Any installation tips that will help others?
did require cutting and welding
View on Jordan's build

TOP RATED Flowmaster Exhaust

  • Flowmaster - FlowFX Cat-Back Exhaust System  photo
    MFR# 717871Flowmaster - FlowFX Cat-Back Exhaust System
    $629.95$699.95
    Save $70.00 (10%) off MSRP
  • Flowmaster - FlowFX Cat-Back Exhaust System  photo
    MFR# 717880Flowmaster - FlowFX Cat-Back Exhaust System
    $249.95$277.95
    Save $28.00 (10%) off MSRP
  • Flowmaster - FlowFX Cat-Back Exhaust System  photo
    MFR# 717887Flowmaster - FlowFX Cat-Back Exhaust System
    $459.95$510.54
    Save $50.59 (10%) off MSRP
  • 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.

    Benefits of adding this mod

    An upgraded exhaust system is one of the easiest modifications that offers an immediate, noticeable performance improvement. Whether you’re cruising an M3 or modding a diesel truck, an upgraded exhaust will open up the restrictive factory system, allowing your engine to breathe better and deliver peak power! From lighter weight exhaust headers to improved cat-back systems, to better sounding mufflers, modifying your exhaust setup is a great place to express the character of your ride in a unique and cost effective way. Whatever you’re looking for in a modified exhaust system, we can provide the absolute best systems to make your vision a reality.

    shipping-worldwide-jpg

    we ship worldwide!

    Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

    + FREE GROUND SHIPPING ON U.S. ORDERS OVER $99
    International shipping icon
    Have a question? Ask an Expert!

    Finding the best parts can be tricky

    - but not to worry! Our team of experienced American Muscle, JDM, Euro, and off-road tuners are ready to answer your questions (as long as we’re not in the garage wrenching on our own builds).

    chat-iconLive Chat
    Ask our expert tuners anything!
    call_iconCall Us
    1 (800) 959-4304
    featured vehicle testimonial imagequote icon

    Wheelwell wants to be the new online hub for car parts and accessories.

    author testimonial image
    featured vehicle testimonial imagequote icon

    Wheelwell helps you organize all your stuff for your car, I’ve loaded all my cars on Wheelwell and you can see all the parts I’ve put in them and that may help you make a decision with your own build.

    author testimonial image

    Matt Farah

    Smoking Tire / The Drive

    featured vehicle testimonial imagequote icon

    Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

    James M.

    Ford Focus ST

    featured vehicle testimonial imagequote icon

    Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

    Wallace R

    Chevrolet Silverado 1500