G4KJ 2.4 Engine Pistons Rings Set 230402G500 234102G500 For Optima Sonata 2.4L 2359CC L4 DOHC This piston ring set is designed for compatibility with 2.4L 2359CC L4 DOHC engines used in Optima and Sonata models. The set includes components identified by part numbers 230402G500 and 234102G500, intended for engine repair and rebuilding applications. It supports proper compression and oil control within the engine cylinder. Installation requires standard mechanical tools and knowledge of engine assembly procedures. This is a non-OEM replacement. Any mention of brand names is strictly for compatibility clarification.