i have an 03 silverado 1500 with a 5.3, i use to tow my mud truck i'm trying to figure how to get the most power and torque out of it, so if anybodys got any do it yourself tricks of the trade, or know the right product to buy i'd appreciate any advice. i'm thinking about using summit shorty headers, summit universal x-pipe kit, high flow cats with glass packs, a throttle body spacer, a spectre cold air intake, i already have a bully dog power pup programmer.

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