Description
Overview
The Flowmaster American Thunder Crossmember-Back Exhaust System is purpose-built for 1967-1972 Ford F-100/F-250/F-350 2-wheel drive V8 trucks without a side mounted auxiliary fuel tank. Engineered to deliver that unmistakable Flowmaster attitude, this complete system starts just after the manifold downpipes and transforms both the exterior and interior sound of your classic Ford, giving your V8 a deep rumble and a commanding presence on the street or the show field.
At the heart of the system are the legendary Super 44 Series performance mufflers, known for their aggressive to moderate tone and the classic Flowmaster sound. Each muffler features an offset inlet, a center 2.50-inch outlet, and a compact 19.50-inch overall length, wrapped in a durable black finish that looks as good as it sounds tucked under your truck.
Key Benefits
Every component is built for flow and longevity. The system uses all mandrel-bent 2.50-inch 409 stainless steel tubing to maximize exhaust pulse flow for better performance while adding the corrosion resistance and durability that stainless steel is known for. A built-in H-pipe crossover is integrated into the design to balance exhaust flow between banks and enhance the overall tone.
- Crossmember-back design that begins just after the manifold downpipes
- Mandrel-bent 2.50-inch 409 stainless steel tubing with silver pipe finish
- Super 44 Series performance mufflers with aggressive to moderate sound level
- Built-in H-pipe crossover for balanced flow and tone
- Dual tail pipe configuration with new hangers and all mounting hardware included
- CARB (California) compliant, Emission Code 5
Choose Your Tailpipe Exit
Dial in the look and sound you want with a choice of three tailpipe exits: straight out the rear, side exit behind each rear tire, or dumped behind the rear tires. This flexibility lets you set up your F-Series exactly the way you like, whether you want a clean rear-exit appearance or a more aggressive dumped setup. Note that exhaust tips are sold separately, so you can finish the system to match your personal style.
Fitment & Installation
This American Thunder system fits both short and long wheelbase 1967-1972 Ford F-100/F-250/F-350 2WD V8 trucks that are not equipped with a side mounted auxiliary fuel tank. It ships as a complete kit with new hangers and all hardware necessary for an at-home installation, making it a straightforward upgrade for the do-it-yourself enthusiast. Backed by Flowmaster’s Lifetime Limited Warranty, it’s a durable, high-performance upgrade you can install with confidence.
Warning: This product carries a California Proposition 65 warning.
