Forged piston kit & steel conrods to suit Ford Zetec 2L ST170. Kit comes with fully skirted pistons at 86mm with valve pockets for inlet and exhaust suitable for VVT use. ring pack, pins and clips. Compression ratio is approx 9:1 but depends on head and gasket used. Conrods are in EN24 steel with bronze small end bushes and come with 12 point big end bolt set.