Reviewed By john b (potomac, IL) Reviewed for a 2005 GMC Envoy —3/31/2016 11:37 AM
It brings the 5.3 alive sound wise and gas mileage has improved alittle bit
Reviewed By David P (Galveston, TX) Reviewed for a 2007 GMC Envoy —1/23/2008 2:08 PM
Great sound with little to no resonance inside cab. Had a muffler included with the JBA exhaust system and it was junk. Stainless steel, but just a big glass pack. The resonance inside cab was horrible. The 70 series sounds good on the outside without the resonance inside the cab.