Reviewed By Jeremy J F (Bremen, KS) Reviewed for a 2013 Chevy Avalanche —6/17/2014 6:02 AM
I love the new Flowmaster super 44 muffler, it sounds just the way I wanted it too. The aggressive sound it puts out brings the 5.3 Avalanche alive.
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.