compatible replacements for Chevrolet GM 4-cylinder 2.5L (153ci) 110HP/120HP and 3.0L (181ci) 140HP See Description for applications Elgin or Melling products depending on availability. This listing is for a set of eight (8) Elgin rocker arm kits, (8) Push rods & (8) Lifters compatible replacements for Chevrolet/GM 4-cylinder engines. Fitment includes 2.5L (153ci) 110HP/120HP and 3.0L (181ci) 140HP marine engines with the Chevy 4 cylinder. These engines are used by various Mercruiser, OMC, , and other marine manufacturers. Rocker kits come complete with rocker arm, rocker ball (fulcrum), and rocker nut for press-in studs.