Engine Piston and Rings Set compatible with GM 2.4L L4 DOHC engines.This set includes 4 pistons and rings, designed for cylinder bore size of 88 mm.Specifications: ring 88 x 1.20 mm, second ring 88 x 1.50 mm, oil ring 88 x 2.50 mm.Fits multiple OEM part numbers including 12578324, 12578326, 12621251, and other interchange numbers listed.Designed for use in select models including Lacrosse, Verano, Captiva Sport, Equinox, Terrain, HHR, G5, G6, Solstice, Aura, Ion, Vue, and Impala equipped with 2.4L 2384CC 145CID L4 DOHC or flex-fuel DOHC 16-valve engines from 2006 to 2017.Installation instructions are not included.Package contains 4 x Pistons and Rings Kit.