Valve Guide Cutter - .500OD

The Valve Guide Cutter - .500OD by Comp Cams is an essential precision tool for cylinder head reconditioning and valve seat machine work. Whether you're rebuilding a classic engine, restoring a performance build, or servicing worn valve guides in production heads, this cutter delivers the accuracy needed for clean, concentric cuts.

Designed with a .500-inch outer diameter, this cutter is engineered to bore out worn guides to a precise standard, ensuring proper valve stem clearance and consistent oil control. The cutting geometry removes material cleanly without chatter or deflection, critical when working with cast-iron or aluminum heads where guide runout directly impacts valve sealing and stem longevity.

This cutter is ideal for machinists, engine builders, and automotive technicians preparing cylinder heads for new or remanufactured valves and guides. It works across a wide range of domestic and import engine platforms where guide sizing calls for a .500OD tool, making it a foundational item in any head machine setup.