Description
Overview
The Flowmaster American Thunder Crossmember-Back Exhaust System is built for the driver who wants a complete, ready-to-install dual exhaust upgrade with a deep, powerful voice. Engineered around the acclaimed American Thunder series, this system replaces everything from the crossmember back and pairs proven Flowmaster muffler technology with mandrel-bent tubing for a clean, purposeful setup that both looks and sounds the part.
At the heart of the system are large-cased Super 40 Series performance mufflers, which are known for delivering a moderate interior tone paired with a deep, aggressive exterior sound. That balance makes it ideal for enthusiasts who want their performance heard on the street without an overwhelming drone inside the cab. An included H-pipe balances exhaust pulses and helps eliminate back-rap on deceleration, refining the overall sound quality.
Construction & Design
The complete system is constructed from 2.50-inch mandrel-bent stainless steel tubing built to a durable 16-gauge pipe wall. Mandrel bending preserves consistent pipe diameter through every curve for smooth, efficient flow. The dual mandrel-bent tailpipes exit straight out the back under the rear bumper, giving the vehicle a strong, muscular stance while leaving the choice of exhaust tip style entirely up to you.
Key Highlights
- Complete crossmember-back dual exhaust system for 2WD applications
- 2.50-inch mandrel-bent stainless steel tubing with 16-gauge pipe wall
- Super 40 Series performance mufflers included for a deep, powerful sound
- H-pipe balances exhaust pulses and eliminates deceleration back-rap
- Dual mandrel-bent tailpipes exit straight out the back under the rear bumper
- New hangers, plus all necessary parts and hardware, included
Sound & Performance
The American Thunder name says it all: this system is engineered to be heard. The Super 40 Series mufflers produce an aggressive-to-moderate sound profile, giving you a commanding exterior note while keeping the interior tone livable for daily driving. The result is a genuine performance character that matches the look of those dual pipes.
Fitment & Installation
Designed for an easy fit, this system is intended for 2WD vehicles and includes new hangers along with all necessary parts and hardware for a straightforward installation. Exhaust tips are sold separately, so you can select the style that best complements your build. The system carries a silver pipe finish, does not include a heat shield, and is emission code 5 rated and CARB (California) compliant. Please note the California Proposition 65 warning associated with this product.
Whether you’re chasing improved flow, a stronger appearance, or a bolder soundtrack, the Flowmaster American Thunder Crossmember-Back Exhaust System delivers a proven, cohesive upgrade backed by Flowmaster’s Lifetime Limited Warranty.
