K Series Engine Cosilbro Valve Guides

Building a high specification engine is expensive so fit the best valve guides.

Colsibro® is a high copper alloy with small additions of nickel and silicon, which offers a remarkable blend of physical and mechanical attributes unrivalled by many other grades of copper alloy.

Widely specified for use in high-performance automotive and motorsport engine components, including valve guides, valve seats, gears and bushes. Its combination of high strength, corrosion resistance, high thermal and electrical conductivity, excellent wear resistance, spark resistance and good cryogenic properties combine to increase the strength, hardness and wear resistance of the material, while retaining many of the physical benefits of copper itself.

Anti-Friction properties prolongs valve stem life, ½ the friction of steel valve guides.

High heat conductivity transfers valves heat through to the cooling system better

Colsibro guides are virtually indestructible once correctly installed and in use

Sold individually (16 Guides are required in total).