Replacements for 1982-93 Chevrolet 6.2L Diesels Pin Diameter: 1.2204 Comp. Distance 2.114 Top Ring Land: 3.00mm, 2nd Ring Land, 2.00mm Oil Ring Land:: 4.00mm. Rings not included. For Standard size 3.976 Bore engines. Set of (8) Pistons compatible replacements for 1982-93 Chevrolet 6.2L Diesel Pistons. Pistons Only--Ring Set Not Included. Flat head w/ Ricardo cup and keystone top ring groove - 21.5:1 CR. This listing is for a set of eight (8) Standard 3.976 Bore diameter.