Nissan RB30 S1 Block Converter

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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 ad apter 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 Show more