The Competition Cams Lifters 813-16 Solid Mechanical Lifters are high-performance vintage parts manufactured in the United States by Comp Cams. These lifters are designed to enhance engine performance and are a crucial component of the valvetrain system. Made with quality materials and attention to detail, these lifters are sure to meet the needs of car enthusiasts looking to upgrade their engines for improved efficiency and power. With a vintage part designation and a reputation for excellence, these lifters are a reliable choice for those seeking top-notch engine components.  Letting You Know Some Of The Lifters Has Stains On Them And Some Surface Rust.  Please See Enclosed Pictures For More Details.  Thank You For Looking And Have A Great Day Ahead!!!