G4KH 2.0T Engine Piston and Pins Kit for Sonata Optima Oversize +0.5MM This piston and pin kit is designed for compatibility with 2.0T engines in Sonata and Optima models.The set includes oversized pistons with a +0.5mm dimension and corresponding wrist pins, intended for engine rebuilds or performance restoration.Components are engineered to meet specifications for fitment and function.The kit supports proper compression and smooth when installed correctly.This is a replacement part from a third party.All brand/model references serve only to show intended compatibility.