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![American Thunder Single Rear Exit Cat-Back Exhaust System for 2021-2023 Jeep Gladiator 3.0L [409 Stainless Steel]](https://www.jegs.com/images/mini_750/300/389/389-818131.jpg)
Vehicle Info NeededFLOWMASTERPART NUMBER: 389-818131
American Thunder Single Rear Exit Cat-Back Exhaust System for 2021-2023 Jeep Gladiator 3.0L [409 Stainless Steel]
$18495
Ships on 10/26/2026
Lowest Price GuaranteeJeep
American Thunder Single Rear Exit Cat-Back Exhaust System2021-2023 Jeep Gladiator 3.0L 3 in. Piping Single Rear Exit 3 in. Polished Tips Clamps and Hangers Included 409 Stainless Steel Natural Finish Sold as a Kit
The American Thunder cat-back system for 2021-2023 Jeep Gladiator replaces the factory exhaust behind the catalytic converter with 3 in. mandrel-bent 409 stainless steel tubing and 3 in. polished tips, for aggressive to moderate sound.
Flowmaster 818131 Features:
- 3 in. mandrel-bent 409 stainless steel tubing in 16-gauge.
- Single Rear Exit with 3 in. polished tips.
- Clamps and factory-style hangers for the stock locations are included.
Flowmaster 818131 Applications:
- 2021-2023 Jeep Gladiator 3.0L
Flowmaster 818131 Compatibility Notes:
- 2021-2023 Jeep Gladiator trucks with 3.0-liter diesel engine.
The Classic Sound of Flowmaster
Flowmaster American Thunder Exhaust Systems for Truck/SUVs are ideal for the one looking for a moderate-to-aggressive exhaust tone, inside and out. The mufflers are tuned to deliver more power, torque, throttle response, and mileage. With easy fitment in mind, each system has mandrel-bent tubing for maximum performance and flow; and includes all necessary parts and hardware for installation.
Part TypeExhaust System
Product LineFlowmaster American Thunder Exhaust Systems for Truck/SUV
BrandFLOWMASTER
Package Height14.0
Package Width14.5
Package Length48.75
Weight24.25 PG
Part CategoryPerformance Parts
Exhaust Tip WallSingle Wall
Exhaust Tip Quantity1
Exhaust Tip FinishPolished
Exhaust Tip EdgeSlash Cut
Tip Diameter3 in (76.2 mm)
Valve IncludedNo
Pipe Material409 Stainless Steel
Hangers IncludedYes
Main Piping Diameter3 in (76.2 mm)
Tail Pipe Quantity1
Tail Pipe Tapered OutletNo
Inlet TypeFlanged
Inlet Size (In.)3
Exit PositionSingle Rear
Exhaust Tip Material304 Stainless Steel
Mounting Bracket IncludedNo
Gaskets IncludedYes
Catalytic Converter Quantity0
Mount TypeUses Factory Hangers
Clamps IncludedYes
Sound LevelAggressive / Moderate
FinishNatural
Exit StyleSingle Out Rear
Clamping TypeFlat Band
Exhaust Tip CutAngled
Gasket Or Seal IncludedNo
Exhaust SeriesAmerican Thunder
Spring Bolt Kit IncludedNo
QuantitySold as a Kit
Exhaust Tip IntercooledNo
Pipe ColorSilver
Muffler IncludedYes
Exhaust Tip Length4.75 in (120.65 mm)
Exhaust Tip ConnectionWelded
Muffler Quantity0
Tail Pipe Outlet Outside Diameter3 in (76.2 mm)
Valve TypeNot Applicable
Exhaust Pipe MaterialStainless Steel
Exhaust Tip ResonatedNo
Exhaust Tip Diameter3 in (76.2 mm)
Part FitmentDirect Fit
Catalytic Converter IncludedNo
Vendor Part Number818131
Package Qty1
Package TypeEA
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