Reviewed By Ian M (Sedgwick, KS) Reviewed for a 1999 Pontiac Firebird —7/10/2011 3:32 AM
Love the sound of my 40 series. I put it on my 99 Trans Am. Sounds great and turns heads. Love it.
Reviewed By John Y (Novi, MI) Reviewed for a 1968 Pontiac Firebird —8/15/2007 10:14 AM
These mufflers sound good outside of the car. They give the car a nice growl. I have a 1968 Firebird with a 400 engine. A little more resonance inside of the car than I expected. I am running 2 1/2" exhaust.
Reviewed By Jacob P (APPLETON, WI) Reviewed for a 2011 Chevy Avalanche —8/15/2017 12:14 PM
Nice replacement that shaves some serious weight, growls low, isn't too loud. Does drone for me a bit in 4 cylinder mode. If your truck is like mine go find some 3 inch Outside Diameter piping and 3 inch inlet outlet muffler and they'll go together well