Cosworth, the same company that designed and built the incredible YB engine 30 years ago, has created these aftermarket Cosworth YB 4WD piston sets for ultimate performance and reliability. Each set contains four Cosworth pistons, pins, clips and high performance rings. Note that these pistons can also be used in 2WD engines, the only difference being a reduction in compression ratio of about 0.2.

The pistons are forged in-house at Cosworth from a high tensile strength 2618 aluminum alloy. Cosworth uses a specially designed forging tool for this piston to get the best grain flow in the most stressed areas.

Available in several sizes = STD / +0.50mm / +1mm