5.7 manifold errosion

[Bushwacker]

If it's an EFI engine, just buy another temperature sensor, mount it somewhere cool and connect the wire from the engine computer to that one instead of the one on the engine. This will fake out the computer and make it think the engine is cold so it needs a richer mixture to adequately vaporize the fuel. Might hurt your gas mileage a bit, but should generate a little more power, plus it's probably cheaper to burn fuel than cast iron, valves and valve seats!