RCM O Ringed Thermal Spacer Kit V5/6 Exhaust Systems A forging is still the

A forging is still the best way to manufacture a piston

5°C conditions are replicated

for use with our own double valve springs and the later style buckets with intergrated shims

Our 740cc high performance

RCM O Ringed Thermal Spacer Kit V5/6 Exhaust Systems A forging is still theThe RCM O Ringed Thermal spacer kit contains everything required to install our Phenolic Spacers to your Subaru. The kit is designed to aid in the reduction of the air inlet temperatures in the inlet manifold, by isolating the manifold from the heat travelling through from the engine's cylinder heads. Sealing between the spacers, manifold and cylinder heads is by the clever integral double "O ring" design meaning conventional manifold gaskets are no