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Install Ferrea Competition Plus Valves and a Ferrea Valve Spring Kit for added durability at high rpm
lighter and more rigid piston spec
Camshafts are supplied with cam card and VTC limiting pins with detailed photo for their placement
These are built to order
These "porting castings" give us a clean slate to put any port size and shape we choose
4 Piston Advanced Performance RACE Valve Spring Kit (S2000) Mitsubishi (Evo X) Install Ferrea Competition Plus Valves4 Piston Racing is proud to introduce a superior valve spring at a competitive price point. Many of the valve springs currently on the market were developed so long ago that they did not consider the RPM range and camshaft size of today's Honda performance engines. We have developed this valve spring kit with high purity large diameter wire so that you can run any of the popular camshafts on the market and operate the engine at higher RPM without the
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