Torque, HP, gas mileage upgrades
Looking into some upgrades and wondering if any have worked for any of you. I have a 2007 new body style silverado, crew cab, short bed, 4x4, 5.3, 3.73 gears. Have any of you had any increase in horse...
Forum Discussion
I have yet to see a post that claims any appreciable difference. I have seen some that "feel" it helped, but that may have been merely to save face.
