These are billet aluminum plugs for the front balance shaft holes. These are only used with our balance shaft delete bushings and when you are removing the factory water pump chain or running short chain. These can be installed with the grooved plug in the exhaust side hole to run the tensioner and use a short chain on the water pump. If you are running no chain, use the solid plug on the exhaust side of the engine. and block oil feed to the balance shaft chain tensioner.
Includes: Two plugs, enough for one engine
Engine Fitment: Ecotec 2.0L, 2.2L, 2.4L
Made in the USA