Customer support

For all queries please contact our Customer Service Team
01895 232215


1. How do I know the sizing for valve seat insert counterbores for the correct interference fit?

Imperial size valve seat inserts are supplied for customers using pre-set cutters that will machine a nominal size counterbore. The interference fit is on the valve seat insert, i.e. The counterbore is a nominal inch size and the interference is already added to the valve seat insert.

Metric valve seat inserts are size as listed, and therefore the counterbore needs to be that size less the interference fit.

2. Can you supply valve seat inserts suitable for unleaded fuel?

All valve seat inserts we supply are suitable for unleaded fuel. We can also supply valve seat inserts suitable for LPG or heavy duty applications.

3. Do you undertake to manufacture bespoke valve guides for my project or classic car or do you only produce volume orders?

We can undertake to manufacture small batch or production quantities of valve guides or valve seat inserts. We supply many manufacturers of cylinder heads and as such your cylinder head may already contain our product. This does not stop us producing a small quantity to your specification.