I have a 04 extended cab Joe Gibbs Silverado. Truck has a LM7 Vortec 5.3L and a Radix supercharger, pulley is 3.60. The truck is bone stock other than an Airraid intake and Superchip Max Microtuner that I used when I bought the truck, what mods would help me get an additional 100 rwhp. Just the necessary mods that would give that me extra power and anything that would need to be strengthen or changed I'm willing to pay for. Don't want to pay for the mods and have the risk of something failing or breaking. Any help would be appreciated.

 

nitrous, headwork, exhaust, cam, high comp pistons, forged engine parts how deep are you looking to dig into the motor? once you start building the motor you can increase boost safely. how much power are you looking to make at the wheels? if you make hp/tq goals it is much easier to determine routes. just my $.02