Reviewed By Sam S (URBANDALE, IA) Reviewed for a 2012 Chevy Silverado —4/16/2015 9:59 AM
Reviewed By Jgru K (Flanders, NJ) Reviewed for a 2004 Chevy Silverado —3/14/2015 5:47 AM
Great replacement for stock cats. Noticed significant increase in power and good sound with Flowmaster muffler . No problem with codes from o2 sensors with new parts. A lot less expensive then stock factory parts.
Reviewed By LANDON J (Littleton, CO) Reviewed for a 2007 Chevy Silverado —2/15/2014 6:56 PM
I have ran Flowmaster Mufflers for years and I love the sound of the Original 40 Series. The sound of the Original 40 Series Mufflers are a very aggressive tough sound that echoes the sound of performance.