These are machined in one go, making sure that they are perfectly concentric and made with the best material for the job

We have a variety of oversizes so you need to state what size you require when ordering.

eg. 0.501-0.502" is +1

      0.502-0.503" is +2 etc

All our inlet valve guides require a stem seal which needs to be purchased separately.

For your convenience, the stem seal part number is 65-307

BSA B44 B25 Inlet Valve guide Oversize Colisbro (stem seal required) PES 41-0632

Add to Order

Click any of the line items below to add them to your order.