CP forged piston kit for RB25DET. 8.5:1 compression ratio with 86.5mm bore (0.02" over). These pistons are custom built by CP, if not in our stock it will take 2-3 weeks to build. Since it's custom built user can also request for different compression and bore sizes based on their needs, if needs customization please call us to order.

*Please Choose The Correct Motor