Allstar Aluminum Camshaft Thrust Button for Small Block Chevy with Late Model Indented Timing Cover features a camshaft thrust button. It fits small block Chevy engines with a late model indented timing cover. It is made from quality aluminum material. The cam buttons limit lateral movement of the camshaft in engines without cam thrust plates. It helps to reduce friction for free horsepower. The machining of the cam sprocket may be required. It is backed by a 90-day limited factory warranty and sold individually.