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...
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With the heavy competition between the truck makers, if doing the mods could net the power and/or mpg gains being advertised, they would be doing it in house.
