Reviewed By Kemuel J (Aurora, CO) Reviewed for a 2002 Chevy Avalanche —8/31/2014 11:05 AM
I love the big block flow master muffler. it sounds great more flow. it was one of my best purchases. Go flow master the best !!!!!!
Reviewed By christopher p (Spring Hill, FL) Reviewed for a 2007 Chevy Avalanche —2/7/2009 4:23 PM
I HAD MY 40 SERIES WELD ON AT A LOCAL MECHANICS SHOP, BUT INSTALATION WAS STRAIGHT FOWARD. I LIKE THE SOUND, BUT I THOUGHT IT WOULD BE LOUDER THAN IT WAS. NEXT FLOWMASTER WILL HAVE TO BE A RACE 40 SERIES. I DIDNT NOTICE ANY PERFORMANCE DIFFERENCE EITHER, DONT KNOW IF I WAS SUPPOSE TO THOUGH. OVER ALL WORTH THE 80 BUCKS I SPENT.
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.