COMP Cams 5003CPG Lifter Bore Grooving Tool .842 Inch Diameter

The COMP Cams 5003CPG Lifter Bore Grooving Tool is a precision engine machining tool designed to cut a precise groove into lifter bores, ensuring optimal oil delivery between the lifter and camshaft contact surfaces. Developed by NASCAR's top engine builders, this specialized tool addresses a critical lubrication need during camshaft break-in and long-term operation.

Key Features:

• Designed for .842 inch diameter lifter bores
• Cuts groove from .009 inch to .012 inch depth
• Steel construction with replaceable carbide cutter
• Complete kit includes grooving tool, cutter, and handle
• Ensures pressurized oil is directly injected into lifter/cam contact area

Benefits:

• Significantly reduces wear on camshafts and lifters
• Minimizes risk of premature failure during break-in period
• Quick, easy, and inexpensive machining operation
• Best insurance policy for protecting new camshaft investment

This tool requires the engine to be disassembled for proper use. The carbide cutter is available separately as a replacement part when needed. Commonly used on popular applications including GM LS-series engines and traditional small block and big block Chevrolet engines with standard .842 inch lifter bores.