COMP Cams 0.560" OD Guide Valve Spring Seat Cutter 1.680" OD Valve Seat Steel/Carbide Universal LY22171 1970-1981 GMC Jimmy

1970-1981 GMC Jimmy

Factory matched LED through-the-dial lighting provides clear visibility during nighttime use and matches OEM instrumentation

Ford Car 1949-51

Compact 38mm body for OE fitment

1994-2004 Ford Mustang

COMP Cams 0.560" OD Guide Valve Spring Seat Cutter 1.680" OD Valve Seat Steel/Carbide Universal LY22171 1970-1981 GMC JimmyMost high performance engines today require the use of larger than stock diameter valve springs. This 1. 680" Spring Seat 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. This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1. 680" outer diameter while reducing the