COMP Cams 0.560" OD Guide Valve Spring Seat Cutter 1.680" OD Valve Seat Steel/Carbide Universal LY22171 These include: High Back Design

These include: High Back Design With Left & Right Rib Supports Constructed of

1970-1981 GMC Jimmy

150 in Long

55 Durometer

125 in Bore

COMP Cams 0.560" OD Guide Valve Spring Seat Cutter 1.680" OD Valve Seat Steel/Carbide Universal LY22171 These include: High Back DesignMost 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