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. World Product's Quick Lock valvetrain stabilizers are a unique approach to the common use of stud girdles for race motors. The difference with these girdles is their easy and quick removal and replacement. They install easily, with no machining on the cylinder head. They come with all necessary hardware, including heat-treated steel rocker arm adjusting nuts.