I want to go with a louder muffler and keep the stock tail pipe. The prob is the stock pipe is bigger then 3" not sure what size it is i heard 3.25" or 3.5" anyone know for sure? I wana use a 5x8 14"body magnaflow muffler. Im not sure what size i should go with 3" or 3.5"? Would the 3.5" hurt my low end torque being a straight through muffler?

 

TTT Any ideas if it will hurt my low end going with the 3.5" magnaflow it has the 403 hp 6.2 w/6l80.

 

ill be going with the banks monster exhaust on my denali,the stock pipe is 3.5,,so no it wouldnt hurt anything,,it will help way better.these 6.2's need to breathe