Most high performance engines today require the use of larger-than-stock diameter valve springs. This .500" Valve Guide Cutter from COMP Cams will allow the engine builder to machine the cylinder head to the proper size for your spring. Each cutter requires the use of an arbor/pilot, which are available in three different sizes
Our valve guide cutter is designed to cut the outside diameter of the valve guide to .500".
Cuts valve guide to .500" O.D.; Other guide cutters available for .446", .494", .530" and .625" guide O.D.
