Making Real Power With a Predator 420 Stage 4 Kit
If you're looking to squeeze every bit of life out of your big block, the predator 420 stage 4 kit is basically the point of no return for most hobbyists. It's that threshold where you stop just "upgrading" a lawnmower engine and start building a genuine powerhouse. Most people start with a simple pipe and an air filter, maybe a bigger jet, but once you start eyeing the stage 4 stuff, you're looking for high-RPM reliability and enough torque to pull your arms out of their sockets. ...