Kia 2351cc (2.4L) (1999-2005) G4JS DOHC Optima 16-Valve 4-Cylinder . This kit contains rod bearings, main bearings, rings, thrust washers, and gaskets. Brands can include Topline, etc. Pictures are generic and we reserve the right to substitute brands. Please call us if you have any questions concerning products. Please include sizes on pistons, piston rings, rod bearings, and main bearings when applicable.