Jims 1352K Valve Spring Kit with Chromoly Retainers - .675in

Incorporate an interference double-spring design with a damper to control harmonics. Engineered for maximum performance in severe applications such as high compression and big-inch street motors. Kits include locks, retainers and spring seats. Made in the USA Incorporate an interference double-spring design with a damper to control harmonics. Engineered for maximum performance in severe applications such as high compression and big-inch street motors. Kits include locks, retainers and spring seats. Made in the USA .675in spring kits are 1.510in o. d. and have a pressure of 184 lb. when closed and 422 lb. at .570in lift; installed height should be 1.850in; coil bind occurs at 1.080in.