Flowmaster American Thunder Crossmember-Back Exhaust System
$899.95
Flowmaster American Thunder crossmember-back exhaust for 1967–72 Ford F-100, F-250 and F-350 2WD V8 trucks, short or long wheelbase. 2.50 inch 409 stainless, Super 44 mufflers.
Install Level: Moderate
Will not fit trucks with a side-mounted auxiliary fuel tank. See the 817934 system for side-tank long beds.
WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead. Learn more.
Flowmaster American Thunder Crossmember-Back Exhaust System
$899.95
Finish the Build Right
Parts our crew pairs with this kit so your swap goes together right the first time.
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American Thunder Crossmember-Back Exhaust System — 1967–1972 Ford F-100/F-250 2WD Long Bed
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This American Thunder exhaust system is specifically designed for 1967-1972 Ford F-100/F-250 2-wheel drive V8 trucks without a side mounted auxiliary fuel tank. The system is perfect for the person looking for an aggressive to moderate exterior and interior sound level. Starting just after the manifold downpipes, this exhaust system comes complete with a built-in H-pipe crossover and all mandrel bent 2.50-inch 409 stainless steel tubing that helps maximize the flow of the exhaust pulses for better performance and the added durability of stainless steel. The Super 44 Series performance mufflers will give any V8 a deep rumble with that classic Flowmaster tone. This system comes with your choice of three tailpipe exits, straight out the rear, side exit behind each rear tire, or dumped behind the rear tires. The system includes all hardware necessary for an at home installation. This exhaust system is covered by our Lifetime Limited Warranty. Fits both short and long wheelbase trucks.
Features:
- 3 Exit Options Allow You to Customize the Look of Your Truck
- 2.5-Inch Mandrel Bent Tubing Improves Exhaust Flow for Better Performance
- Super 44 Series Mufflers Give You a Deep, Classic Muscle Truck Sound
- H-Pipe Style Crossover Pipe Improves Performance and Reduces Interior Sound
- Includes all Necessary Hangers and Hardware for an at Home Installation
- 409 Stainless Steel adds Corrosion Resistance and Durability
- Backed by Flowmaster’s Lifetime Limited Warranty
Flowmaster part number 817938
Material: 409 stainless steel; mandrel bent
Tubing diameter: 2.50 inch
Built-in H-pipe crossover - improves performance and reduces interior sound
Mufflers: Super 44 Series chambered
Three tailpipe exit options: straight out the rear; side exit behind each rear tire; or dumped behind the rear tires
Starts just after the manifold downpipes
Fits short and long wheelbase trucks
All necessary hangers and hardware included
Lifetime Limited Warranty
Material: 409 stainless steel; mandrel bent
Tubing diameter: 2.50 inch
Built-in H-pipe crossover - improves performance and reduces interior sound
Mufflers: Super 44 Series chambered
Three tailpipe exit options: straight out the rear; side exit behind each rear tire; or dumped behind the rear tires
Starts just after the manifold downpipes
Fits short and long wheelbase trucks
All necessary hangers and hardware included
Lifetime Limited Warranty
1967-1972 Ford F-100; F-250; F-350 - 2WD V8.
Trucks WITHOUT a side mounted auxiliary fuel tank.
Short and long wheelbase.
Installs from just after the manifold downpipes.
Trucks WITHOUT a side mounted auxiliary fuel tank.
Short and long wheelbase.
Installs from just after the manifold downpipes.
Talk to a Parts Specialist
Not sure it fits your truck, or planning a bigger build? Our parts specialists will help you get the right parts the first time.
Tip: have your truck's year, make and model handy.
Hours: Mon–Thu 8am–5pm · Fri 8am–2pm (Arizona Time)
Reach out after hours and we'll get back to you the next business day.