Nissan RB30 S1 Block Converter

RB30 Series 1 block converter to S2, allows for passenger side tensioner landing so that you can utilise your series 1 block for twin cam head applications.

(Note kit includes 1 adapter plate and 1 Tensioner pulley post)

Note: 30mm is the most common where as the 28mm is a rarer sizing

Installation guide here-> RB Block Pulley Conversion