COMP Cams 0.560" OD Guide Valve Spring Seat Cutter 1.680" OD Valve Seat Steel/Carbide Universal 42041BL RJS Mid-tops also feature a

RJS Mid-tops also feature a Velcro strap closure for more ankle stability

Original Race True Roller

Window Crank

1985-1986 Chevrolet C10

the importance of differential temp can't be understated

COMP Cams 0.560" OD Guide Valve Spring Seat Cutter 1.680" OD Valve Seat Steel/Carbide Universal 42041BL RJS Mid-tops also feature aMost 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