Platinum Racing RB Oil Gallery Block Off
An oil gallery block off is necessary when fitting a twin cam head to an RB30 bottom end.
You will need to block off the rear oil sullply hole (designed for hydraulic heads)
You will also need this oil gallery block off when running a RB26 (solid head) on a RB25 block, As well as blocking the Rb25 VCT oil gallery when using an RB26 head on a RB25 block.
