• FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
  • FLOWMASTER 818131 Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit
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FLOWMASTER

Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit

Flowmaster 818131 American Thunder Filter-Back Exhaust System - 3.0 Inch Single Out Rear Exit

F13818131

$283.99
$283.99
Sale Sold out
Shipping calculated at checkout.

Low stock
  • Genuine brand-name parts
  • Ships from US warehouse
  • 30-day returns

Fits: 2021–2023 Jeep Gladiator

  • 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • 3.00-inch polished stainless steel tip adds a custom look to the truck
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • Max dyno gains of 3 hp and 5 lb-ft at the rear wheels

Fits 2021-2023 Jeep Gladiator 3.0-Liter Diesel, Filter-Back, Single Rear Exit, American Thunder Stainless Steel Exhaust System. This Flowmaster American Thunder cat-back exhaust system for the 2021-2023 Jeep Gladiator trucks with the 3.0-liter diesel engine is manufactured using durable 409 stainless steel throughout and features 3.00-inch mandrel bent pipes for better exhaust gas flow. This system removes the muffler for an aggressive to moderate sound level and maximum performance, while also adding additional clearance when driving off-road. Maximum dyno gains of 3 hp and 5 lb-ft over stock were measured at the rear wheels. This system exits with a 3.00-inch polished stainless steel tip for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster's Lifetime Limited Warranty.. 2021-2023 Jeep Gladiator trucks with 3.0-liter diesel engine.

Brand FLOWMASTER
Manufacturer part number 818131
UPC / GTIN 90127615522
Weight 24.25 lb
Dimensions (L × W × H) 48.8 × 14.5 × 14 in
Category Engine & Drivetrain
Condition New — genuine brand-name part
Genuine brand-name part, full manufacturer warranty. Ships from the closest US warehouse — normally within 1–3 business days. Verify fitment with the manufacturer part number above; not sure? Send us your VIN and we’ll confirm before you order. 30-day returns on unused parts.

Shipping & delivery

Orders ship from the distributor warehouse closest to you, normally within 1–3 business days of purchase. Standard ground delivery takes 3–7 business days in the continental US; expedited options are shown at checkout. Oversized items (bumpers, running boards, large tonneau covers, some marine equipment) ship LTL freight — we contact you to schedule delivery and a signature is required.

Returns & warranty

Unused, uninstalled parts in original packaging can be returned within 30 days of delivery. A restocking fee of up to 20% may apply depending on the product and supplier, and return shipping is the buyer’s responsibility unless the item arrived defective, damaged or incorrect. Every product carries the full manufacturer warranty. Contact us with your order number to start a return.

Fitment & part numbers

Verify fitment with the manufacturer part number shown above and your vehicle’s year, make, model and trim. If the listing says “Fits select…”, confirm your exact application before ordering. Not sure? Send us your VIN and the part number and we’ll check it for you.

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