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4P PSI Pro Stock valve springs
4 Piston Racing K20C1 Crate Engine
Honda 84mm or 90
There is nothing you can do to avoid this
Every detail matters when you are chasing the edge
4P RACE CASTING CNC Cylinder Head Stroker Kits 4P PSI Pro Stock valveIntroducing the 4P Race Casting Months of development has lead to this. In 2018 we worked tirelessly on developing a superior port for our Billet K20 cylinder head. It is a clean slate design that could not fit into any OEM cylinder head casting, and one that outflowed anything on the market by a landslide. Unfortunately after complaints from our competitors, our Billet head was banned from competition. We immediately put that energy into developing a
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