Rb25 head - Rb26 head bolts

[B33st]

I am about to drop my rb25 head of for a slight port and general titdy up as well as getting my tomei springs and cams fitted. What i just thought about though is if i was going to be using an ARP rb26 head stud kit what mods will need to be made to the head.

leigh.

[Russco]

).

[Sydneykid]

RB25 head bolts are 11mm, RB26 head bolts are 12mm, so you would have to drill and tap the block and drill the head for the larger diameter:cheers: