In the early-'90s, GM introduced the Second-Generation LT1 small-block. It featured reverse-flow cooling and an aluminum cylinder head with a new port configuration. In essence, the company created ...

Modifications for your 5.3L Vortec V8 engine are a lot like eating potato chips ... you can't stop at just one. It starts innocently enough with a cold air intake, because hey, who doesn't want better ...

First-gen versions of the Vortec top out at 310 hp and and 335 lb-ft, while second-gen Vortecs can produce up to 325 hp and 350 lb-ft of torque.