Products included: * 4 Pcs Engine Piston * 4 Pcs Engine Piston Pin * 1 Set of Engine Piston Rings Compatible With: * For 2011 - 2013 OPTIMA 2.4L 2359CC L4 DOHC * For 2011 - 2013 OPTIMA 2.4L 2359CC L4 ELECTRIC/ DOHC * For 2011 - 2013 SORENTO 2.4L 2359CC L4 DOHC * For 2011 - 2013 SONATA 2.4L 2359CC L4 DOHC * For 2011 - 2013 SONATA 2.4L 2359CC L4 ELECTRIC/ DOHC Part Number: * 23040-2G500,23410-2G500,230402G500,234102G500 Regularly Replacement: * Over time,engine pistons and rings can wear out due to heat,friction,and general wear and tear. This can result in decreased engine performance and increased oil consumption. It is important to regularly inspect and replace these components as needed to maintain the proper functioning of the engine. * Use an oil lubrication on piston and ring before compressing: * Place piston inside the cylinder,tighten the compressor,lightly tap the piston into the bore with a rubber mallet while holding downward pressure on compressor. * Piston Ring Compressor and piston ring pliers.Piston ring disassembly process,expanding the piston rings: * Piston installer plier used for installs and removes piston rings; Easy to use,safe and reliable.Repairing,replacing,and cleaning your piston is made easier with the help of this piston service tool set. Delivery Details: * Before odering,please confirm your model number and part number.