Flowmaster American Thunder Cat-Back Exhaust System
- Mild interior drone and aggressive exterior tone
- Tested dyno tuning
- Full bolt-on fitment
- Made with tough steel
- Limited lifetime warranty
- Made in the USA
The Lowest Price Perfect Fit Guarantee
Our #1 value is customer service.
We believe in doing right by our customers, no matter what it takes.
In keeping with that, we offer a “perfect fit guarantee” that ensures your satisfaction on 3 levels: low price, free shipping, and perfect fitment.
- Alan Marek, Founder of PartCatalog.com
The Lowest Price Anywhere--Guaranteed
At PartCatalog, we’ll beat any competing vendor’s price. And we’re so confident in our rock-bottom prices that we’ll refund the difference if you find a lower price elsewhere.
Free Shipping Both Ways
Our “free shipping both ways” policy means that returns and orders ship free of charge. When you place an order, you pay only the list price and any applicable taxes. We cover the shipping to save you money and ensure timely delivery.
100% Guaranteed to Fit
In the highly unlikely event of a fitment problem, we’ll return your purchase at no cost to you. We pay return shipping on all orders, so it won’t cost you a penny to send back a defective part.
- Excellent performance exhaust system uniquely designed with Flowmaster technology
- Super 44 series muffler that is louder than stock variety with a deep throaty tune
- Tested and proven dyno tuning for maximum performance
- Mandrel bent tubing for maximum undeterred flow
- Available in two options: stainless steel and aluminized steel
- Full bolt-on fitment with factory mounting points
- Made with tough industrial-grade steel to last long
- Limited lifetime warranty to guarantee quality
- Made in the USA with authentic material and superior technology
Excellent performance exhaust system
The Flowmaster American Thunder exhaust system delivers exceptional performance for a reasonable price. It is assembled with the best quality parts, each individually crafted and handpicked for the ultimate exhaust flow.
Aggressive tone muffler
The exhaust system includes a 44 series Flowmaster muffler. It is louder than most stock mufflers with a mild interior drone and aggressive exterior tone. It is made of premium grade stainless steel for superb strength and excellent performance.
The manufacturer has tested the exhaust system on the dyno and proved its quality, performance, and adherence to industrial standards.
Undeterred exhaust flow
The Flowmaster American Thunder exhaust system also features a mandrel-bent tubing. This allows the exhaust gases to flow smoothly without any deterrence.
Available in two options
You can choose between exhaust systems with stainless steel components and those with aluminized steel.
Easy bolt-on fitment
The exhaust system is easy to install. It has factory mounting points for a full bolt-on installation. The purchase includes all installation hardware including clamps and bolts. It is advisable to have a professional do the job for the best error-free fitment.
Made strong to last long
The Flowmaster American Thunder exhaust system components are made with high-grade steel. It is strong and virtually indestructible. It will withstand years of use to maintain its strength and value.
Limited lifetime warranty
Flowmaster offers a limited lifetime warranty to the stainless steel exhaust systems. A 3-year warranty applies to the aluminized steel exhaust systems. This is a guarantee of superior quality and expert crafting.
Proudly made in the USA
True to its name, the Flowmaster American Thunder is proudly made in the USA. Expert crafters manufacture each part form the finest and most authentic steel in the industry. The company also creates jobs for thousands of Americans every year and uses locally made materials.
Lifetime Limited Warranty applies to Flowmaster all stainless steel exhaust systems.
Three (3) Year Limited Warranty applies to Flowmaster aluminized steel exhaust systems.
The following part numbers are available in this product line:
To purchase this product for your vehicle, please select the Year, Make and Model of your vehicle at the top of this page.
Avalanche 1500, Blazer, C1500, C2500, C3500, Camaro, Cavalier, Corvette, K1500, K2500, K3500, Silverado 1500, Silverado 1500 Classic, Silverado 1500 HD, Silverado 2500, Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, Suburban 1500, Tahoe
Challenger, Charger, Durango, Magnum, Ram 1500, Ram 2500, Ram 3500
F-150, F-150 Heritage, Focus, Mustang, Ranger
C1500, C2500, C3500, K1500, K2500, K3500, Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Sierra 3500 HD, Yukon, Yukon XL 1500
Grand Cherokee, Wrangler, Wrangler JK
1500, 2500, 3500
86, Tacoma, Tundra
Reviews From Verified Customers