Reviewed By Abel p (EAST PROVIDENCE, RI) Reviewed for a 2004 Hummer H2 —12/25/2014 5:15 AM
Great muffler for the price
Reviewed By Jeff T (Des Moines, IA) Reviewed for a 1999 Dodge Dakota —6/20/2017 3:20 AM
The 12579 is a large case single inlet, single outlet muffler. Internally the exhaust is split running the length of the case rejoining before exiting. The muffler has a nice quiet rumble at idle with no drone at speed. It has a nice performance sound when the throttle blades are opened wide. Install consists of headers, 2 1/4" to 3" Y-pipe, 3" through remainder.
Reviewed By Cody N (Columbia, MO) Reviewed for a 2004 Chevy Silverado —6/14/2017 6:29 AM
Bought this muffler dual in dual out ad had it installed on my 04 Silverado SS along with 2 thunderbolt high flow cats. The first time I started it up it startled me in a good way. The sound was everything I was looking for. It's pretty loud but I love it, sounds like a beast