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Colsibro 911 Valve Guides

220.00
sold out
Colsibro 2_zpsuwsi03fe.jpg

Colsibro 911 Valve Guides

220.00
sold out

Porsche 911 Colsibro Valve Guides

This material is a precipitation hardening Copper/Nickel/Silicon ally that has excellent strength, resistance to galling, low coefficient of friction and a Thermal Conductivity that is much higher than any of the Manganese Bronzes.

It is a material of choice for many F1 and LeMans engines and is used by companies such as GS Valves for all of the guides they sell in their Race Engine Components catalogue.

All basic dimensions are within the tolerances shown in the Porsche Technical Specifications with the concentricity of the bore of the guide being within 0.025mm TIR.

We can provide guides in 3 sizes:

  • Std. Guide: 13.060 Bore in Head: 13.00-13.018

  • 1st Oversize: Guide: 13.26 Bore in Head: 13.00-13.20

  • 2nd Oversize Guide: 13.46 Bore in Head: 13.20-13.40

Free UK postage on all our products!  We can ship this item worldwide for £30.

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Porsche 911 Colsibro Valve Guides

This material is a precipitation hardening Copper/Nickel/Silicon ally that has excellent strength, resistance to galling, low coefficient of friction and a Thermal Conductivity that is much higher than any of the Manganese Bronzes.

It is a material of choice for many F1 and LeMans engines and is used by companies such as GS Valves for all of the guides they sell in their Race Engine Components catalogue.

All basic dimensions are within the tolerances shown in the Porsche Technical Specifications with the concentricity of the bore of the guide being within 0.025mm TIR.

We can provide guides in 3 sizes:

  • Std. Guide: 13.060 Bore in Head: 13.00-13.018

  • 1st Oversize: Guide: 13.26 Bore in Head: 13.00-13.20

  • 2nd Oversize Guide: 13.46 Bore in Head: 13.20-13.40

Free UK postage on all our products!  We can ship this item worldwide for £30.