The COMP Cams 812-16 Engine Valve Lifter Kit is a high-quality product manufactured by Comp Cams in the United States. This kit includes valve lifters designed to improve the performance of your engine by ensuring proper valve operation. Made with durable materials and precision engineering, this kit is lightweight at 3.7 pounds, making it easy to install and use. Additionally, it is important to note that this product carries a California Prop 65 Warning for cancer and reproductive harm, ensuring users are aware of potential health risks associated with the product.