This lifter set is designed for use with 2014+ Gen V LT1 L86 6.2 AFM DOD engines, and is manufactured in the United States by Michigan Motorsports. It is a performance part that is intended to improve the engine's performance, and is suitable for use in cars and trucks.The kit includes all the necessary components to replace the factory lifters, and is made from high-quality materials. It is easy to install and will provide a significant lift to the engine's valves. This lifter set is a great choice for anyone who wants to improve their car's performance and achieve a better driving experience.