Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is engineered for the 2018-2026 Jeep Wrangler JL, fitting both 2-door and 4-door models equipped with the 3.6L engine. Built for drivers who want a moderate-to-aggressive exterior tone paired with a mild, comfortable interior sound, this American Thunder system delivers the performance-focused breathing improvements Flowmaster is known for. It’s a true bolt-on, Dual Out Rear design that installs using the factory hangers, so you get a purpose-built upgrade without cutting or fabricating.
At the heart of the system is the stainless steel 80 Series crossflow muffler, backed by a specially designed stainless steel reflection resonator up front that keeps in-cabin drone and resonance to a minimum. From the 2.50-inch mandrel bent stainless inlet pipe to the dual 2.50-inch mandrel bent tailpipes, every section is built to promote smooth, unrestricted flow. The system finishes with large dual 4.00-inch black ceramic coated Flowmaster stainless steel tips carrying an embossed logo for a stealthy, modern look.
Key Benefits
This is a complete kit that includes the muffler and all necessary parts and hardware, making it a straightforward driveway install. The offset-inlet, dual-outlet 80 Series crossflow muffler measures 32.00 inches overall with 2.50-inch outlets, while the compact reflection resonator (11.50″ long x 6.00″ wide x 3.00″ tall) is tuned specifically to tame interior noise. Because the system relies on factory hangers, positioning and fitment stay dialed in.
- Fits 2018-2026 Jeep Wrangler JL 2-door and 4-door with the 3.6L engine
- Stainless steel 80 Series crossflow muffler for a proven aggressive-yet-refined tone
- 2.50-inch mandrel bent stainless inlet pipe and dual 2.50-inch mandrel bent tailpipes
- Dedicated stainless steel reflection resonator to reduce interior resonance
- Dual 4.00-inch black ceramic coated stainless tips with embossed logo
- Dual Out Rear configuration that mounts to factory hangers
Sound & Style
Flowmaster tuned this American Thunder system to hit the sweet spot: an aggressive presence outside the vehicle and a moderate note overall, while the front reflection resonator holds interior tone to a mild, livable level. The black muffler and silver pipes are capped by black ceramic coated tips, giving the rear of your Wrangler a clean, stealthy finish that complements the modern JL styling.
Fitment & Compliance
Designed as a perfect-fit, emissions-legal upgrade, this system is CARB (California) compliant with Emission Code 5. Note the California Proposition 65 warning. With everything included for installation and no heat shield required, upgrading your Wrangler’s exhaust is a confident, home-friendly project that delivers Flowmaster performance and sound.
