1.254" OD x 0.880" ID Valve Spring, 0.490" Max Lift

The Comp Cams 981-16 is a set of single outer valve springs engineered for performance engine applications. COMP Cams utilizes a rigorous development process, from selecting the appropriate metal stock to finalizing the design, to produce valve springs that meet the demanding standards of modern engine builders and racers. These valve springs feature precise specifications, including a 1.254-inch outer diameter, a 0.880-inch inner diameter, and a 1.150-inch coil bind height. They offer a seat pressure of 105 lbs. at 1.700 inches and an open pressure of 273 lbs. at 1.250 inches. The maximum valve lift is rated at approximately 0.490 inches at the recommended installed height. Each spring includes a damper for enhanced performance and longevity. The 981-16 valve springs are sold as a set of 16. While the provided evidence does not specify exact vehicle fitment, the product's design and specifications suggest compatibility with performance-oriented engine builds, particularly those requiring precise valve control and higher lift camshafts. Users have noted their suitability for use with Vortec cylinder heads and COMP Cams Xtreme Energy Camshafts.