Peace, mercy, and blessings of God be upon you. Installation of ZR1 cam + cancellation of DUD plate is available. With lifters + valve seal change with grinding👍🏻 With a three-month warranty👍🏻 Caprice _ Camaro _ Tahoe _ Yukon _ Denali _ Cadillac Escalade _ Sierra _ Silverado For contact: ( Phone number appears when clicking the contact button )