The COMP Cams Valve Lifter Set 834-16 High Energy Hydraulic is a set of valve lifters designed for 352-428 FE engines. Made in the United States by Comp Cams, these hydraulic valve lifters have a height of .875 inches and come with a warning about potential cancer and reproductive harm. With a focus on high energy and performance, these valve lifters are a key component for any engine looking to improve its valvetrain system.