williams head on a valver ?

[luke2405]

just wondering if you would have to change the manifold or is it the same ? when putting a williams head on a valver

anyone know ?
:S

 

[BenR]

same.

 

[dannyboy]

will there actually be a power gain?

 

[BenR]

minor

 

[luke2405]

just doing it because my valver ead looses oil and it works out cheaper