Crower 66575X989-1 Features:

Precision drill jig kit for Groove Lock Rollers with .989 in. roller O.D. fitment Designed for accurate drilling and exact alignment during engine block modification 1-piece construction helps support reliable positioning for valvetrain installation Built for custom engine building, professional engine shops, and racing applications

Drill Jig Kit For Groove .989 In. Roller O.d. Features:

• Precision drill jig for Groove Lock Roller Lifters with exact .989 in. roller O.D. fitment and alignment control
• One-piece construction for consistent drilling accuracy in custom engine block modification and lifter installation
• Designed for Groove Lock roller applications requiring precise lifter bore positioning during valvetrain setup work
• Specialized tooling for high-performance engine building, racing valvetrain modifications, and repeatable installation results
• Professional-grade jig kit that supports accurate roller lifter installation while helping maintain engine block integrity