M Mastermech New member Joined Mar 11, 2015 Messages 10 Reaction score 0 Points 0 Location Southern NJ Sep 21, 2019 #1 Looking for advice on a performance exhaust system for my 2007 Envoy Denali with a 5.3 L engine. Either full system or muffler. I called Flowmaster and they said they had nothing.
Looking for advice on a performance exhaust system for my 2007 Envoy Denali with a 5.3 L engine. Either full system or muffler. I called Flowmaster and they said they had nothing.
