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This CP forged piston and ring set fits Nissan RB30/RB25DET engines with an 86.5mm bore and +0.5mm oversize, supplied as a six-cylinder set. The kit lists an 8.5:1 compression ratio and includes matched pistons and rings for rebuilds or bore-up projects. It’s a straightforward piston replacement option for RB motors needing the specified bore and oversize combination.
CP Piston & Ring Set for Nissan RB30/RB25DET-Bore (86.5mm)-Size (+0.5mm)-CR (8.5) - Set of 6
