Forged piston kit to suit Ford Ultima/Galaxy 2.3 Y5A/B engines at 90mm Kit comes with pistons, ring pack, pins and clips. Compression ratio is increased from std 10.0:1cr to 10.8:1cr with 5cc intruder. This may be machined to lower compression ratio if required. Valve pockets suitable for almost any camshafts. Other bore sizes to order. These require fitting of small end bush as pins are floating.