I HAD DAUL EXHAST PUT ON THE SILVERADO. CAN'T BELIVE THE POWER DIFFERENCE. I'LL FIND OUT THE MILAGE DIFFERENCE ON THE NEXT COUPLE TANKS.
You certainly arent going to gain any torque, at least not much but most of the time you wont loose it unless you're going with HUGE pipes and headers that have NO backpressureBut you lose torque?
Wont kill it but it does definately take away from it. I have owned quite a few chevy's and had exhaust on all. It depends what you are using the truck for. I like my set-up for all around towing and haulin ass.true dual exhaust with no cats and no muffler and a 4 inch pipe will take away from the low end significantly... True dual with 2 cats, muffler, and 3 inch pipe, wont kill your lower end