Reviewed By Steve L (Centennial, CO) Reviewed for a 2007 Hummer H2 —1/11/2010 9:43 AM
These are always a must on any vehice that needs more sound and performance.
Reviewed By James E (MOUNT HOLLY, NJ) Reviewed for a 2011 Dodge Ram —6/8/2013 11:02 AM
I had originally bought the American thunder kit from flowmaster for my truck. But the 50 series muffler wasn't giving me the sound I wanted. So I swapped it for the super 40 for better sound. It gave me just that and much better top end. Just a great product. I have been paid several compliments about how my truck sounds now. Definitely worthy of the title "American Thunder" now. Buyer beware, you will need about 16-18 inches of 3 inch piping to make this work.