Help eliminate stud flex. These CNC-machined stud girdles help control valve lift and timing changes due to stud flex, allowing for more consistent high-rpm performance. Each stud girdle is anodized red and comes with high-quality mounting hardware and hardened adjusting nuts. Tall-style valve covers are required. Keep your valvetrain located properly and stabilized with these lightweight aluminum, CNC machined stud girdles, ensuring you get all the horspower from your high performance engine that's normally lost through deflection. Sold as a pair.