Kit includes Racing Dual Valve Springs, Chromoly Retainers and Hardened Valve Locks. Valve guide boss must be machined for all dual spring kits. Same Dual Springs as P/N: 4037.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. All parts legal for use on pre-pollution controlled vehicles only.