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817674 - Cat-back System 409S - Single Rear Exit - American Thunder - Moderate Sound - default Image
817674 - Cat-back System 409S - Single Rear Exit - American Thunder - Moderate Sound - additional Image
817674 - Cat-back System 409S - Single Rear Exit - American Thunder - Moderate Sound - additional Image
2007-18 Jeep Wrangler JK, 3.6L, 3.8L - American Thunder Cat-back Exhaust System 817674YouTube Button

Cat-back System 409S - Single Rear Exit - American Thunder - Moderate Sound

American Thunder Kit

PART# 817674

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$508.95   Suggested Retail
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Fits 2007-2018 Jeep Wrangler JK 2Dr/4Dr with 3.6L or 3.8L engine

Overview

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.

Features:

  • Lifetime Limited Warranty
  • Patented Laminar Flow Technology
  • Provides Maximum Off Roading Clearance
  • Stainless Steel Construction

Specs

2WD/4WDRWD/4WD
BrandFlowmaster
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Emission Code5
Exhaust SeriesAmerican Thunder
Heat ShieldNo
Inlet Diameter (in)2.5
MaterialStainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler SeriesSuper HP-2
Outlet Diameter (in)2.5
Product TypeExhaust Systems / Kits
Single DualDual
Sound LevelModerate Sound
System TypeCat-back System
Tip Diameter (in)3
Tip Length (in)3.75
Tip Quantity1
Tubing Diameter (in)2.5
Part Number817674

Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

Fits 2007-2018 Jeep Wrangler JK 2Dr/4Dr with 3.6L or 3.8L engine

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        Some parts are not legal for use in California or other states with similar regulations.