These are machined in house from the best material out there and machined in one go.

Standard size is 0.500-0.501"

We have a variety of oversize valve guides +1 upwards.

+1 being 0.501-0.502"

+2 being 0.502-0.503" etc.

Each one is checked to make sure it is completely concentric

When ordering please state the oversize you require

 

BSA B50 Oversize Exhaust valve guide 71-1627 (Colisbro) PES

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