VALVE GUIDE SET 4G63 by Tomei
TOMEI Valve Guide Since Phosphor Bronze (Cn-Sn-P alloy) has intensity and high thermal conductivity it is used for the TOMEI Valve Guides, which support higher engine rotation and higher performance engines. Moreover, since its rubbing characteristic is higher than general material, clearance with valve can be made smaller and attachment of the circumference of valve and operation accuracy can be improved.
With the purchase of the ferrea 6000 series valves, the valve guides by Tomei are a must. Don't let your head get rebuilt without these.