This piston and ring assembly kit is designed for replacement service on internal combustion engines using the G4KG powertrain architecture.The set includes pistons and corresponding piston rings engineered to match the specified bore and pin dimensions for the G4KG engine platform.Reference numbers include G4KG and Theta II 2.4L.This kit is compatible with the following vehicle models equipped with the 2.4L petrol engine and engine code G4KG Theta II: TQ iLoad (2007–2017), TQ iMax (2007–2017), TQ i800 (2007–2017), TQ Starex (2007–2017), and TQ H-1 (2007–2017).Installation requires removal of the cylinder head and oil sump.Proper piston orientation must follow timing mark alignment.Position piston ring gaps according to manufacturer specifications.Torque application for connecting rod bolts and cylinder head fasteners must follow factory-recommended procedures to correct seating and sealing.