Bronze Valve Guide 5/16"

This is our bronze valve guide which is suitable for Riley 9hp, 12/4, 12-14-15/6 engines. 
 
This replaces the original cast steel item and is suitable for the standard Riley Valves which have a 5/16" stem diameter. 
 
It offers better heat dissipation, less wear on your valve stems and is also modified to take a valve stem seal.  
 
Please Note
These guides cannot be used with the stem seals on the O.E. double valve springs due to the diameter of the stem seal the inner spring catches them. We usually fit these with our performance single spring conversion.