Reviewed By STEVE C (Ruston, LA) Reviewed for a 2013 GMC Sierra —10/28/2014 7:00 AM
FLOWMASTER 10 MUFFLERS SOUND GREAT AND INSTALL EASY, AND A GREAT PRICE.
Reviewed By Andrew V (EAST WINDSOR, CT) Reviewed for a 2013 GMC Sierra —10/11/2013 8:04 AM
Shipped very fast i literally got an email saying it was shipped and a txtfrom my wife that it was delivered at nearly the same time. Noticeable better gas mileage i had the same muffler on my last gmc truck and will continue to use super 40 mufflers