PRP 1/2 Inch Head and OEM Head Dowels - Nissan RB rb25 brace *This brace is for the

*This brace is for the serious racers here

then this is it

Suitable for race cars

and test results

and Purple

PRP 1/2 Inch Head and OEM Head Dowels - Nissan RB rb25 brace *This brace is for the1 2 inch head dowels Anyone fitting half inch head studs to an RB (should be all rb25 and 30 blocks) They suit OEM replacement also. Need these! We have recently discovered that many people dont use dowels when converting to 1 2 inch head studs, they are absolutely crucial to stop the head from walking around and hurting your gasket seal! The reason you cant run an RB26 type M12 12 mm Stud in an RB20, 25, or 30 is because they are originally 11mm