American Thunder™ Stainless Steel Cat-Back Exhaust System with Split Side Exit by Flowmaster®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5". Exhaust System Sound: Moderate. American Thunder exhaust system is perfect for the person looking for a moderately aggressive sound level outside of the car, while maintaining a mild sound level inside, with all of the performance benefits that you would expect from Flowmaster. American Thunder gives you the classic sound of a Flowmaster chambered exhaust, which is the classic sound of classic American big performance engines. This is a system that gives the most sedate vehicle a performance rumble.
This review of the product would of been higher if flowmaster would of made the kit easier to install. I had it Professionally installed and I’m glad I didn’t do it myself because it definitely needed modification right at the mid joint flange area of the truck. Pictures below will be provided. Also the two tail ends are not symmetrical/even. Kit just seemed half a$&. Disappointed by that but the sound is amazing. Very deep growl and drone is truly moderate.
Pros : deep throaty growl
Dual end pipes
Perceived performance gain
Cons: doesn’t fit properly and needed adjustment from professional
Customer service did not understand the issue