VALVE GUIDE SET (8) MANGANESE BRONZE TYPE

New colour, specially heat treated manganese bronze guides. Although Silicon bronze valve guides were used for their extremely good wear values, they were very hard and not user friendly when fitting.

We therefore introduced Manganese bronze guides which have good cutting properties and good wear characteristics and are original equipment on Porsche and Mercedes.

Minispares use the manganese bronze guides & have them specially heat treated for performance use.

These valve guides are recommended when using all EN214N s/steel valves. Exhaust valve guides should be opened up 1/2 thou (0.0005") more.

These can be used for Pre 2012 8 port heads but will need circlip grooves machined in, plus shortening where required.