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This COMP Cams 3/8" arbor/pilot is built to center spring seat and valve guide cutters for use with 3/8" valve stems. It is required for proper alignment when using COMP's cutters and is suitable for guide shortening for high-lift cams or for preparing guides when installing PTFE seals, ensuring the cutter runs true during head machining.
COMP Cams 3/8 Arbor (For Cutters)
