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Spring Seat Cutter for GM Vortec - 1.320" Spring Seat O.D. .630" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.320" outer diameter while reducing the outer diameter of the valve guide to .630". Ideal for installing larger springs on GM Vortec head.

Spring Seat Cutter - 1.440" Spring Seat O.D. .630" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.440" outer diameter while reducing the outer diameter of the valve guide to .630".

Spring Seat Cutter - 1.550" Spring Seat O.D. .630" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.550" outer diameter while reducing the outer diameter of the valve guide to .630".

Spring Seat Cutter - 1.580" Spring Seat O.D. .630" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.580" outer diameter while reducing the outer diameter of the valve guide to .630".

Spring Seat Cutter for GM Vortec - 1.350" Spring Seat O.D. .775" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.350" outer diameter while reducing the outer diameter of the valve guide to .775". Ideal for installing single springs on GM Vortec head.

Spring Seat Cutter - 1.680" Spring Seat O.D. .630 Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.680" outer diameter while reducing the outer diameter of the valve guide to .630".

Spring Seat Cutter - 1.810" Spring Seat O.D. .630 Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.810" outer diameter while reducing the outer diameter of the valve guide to .630". Ideal for use with 26028 and 26030.

Spring Seat Cutter - 1.740" Spring Seat O.D. .630 Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.740" outer diameter while reducing the outer diameter of the valve guide to .630".

5/16" Arbor/Pilot for Spring Seat and Guide Cutters; This arbor is designed to center a spring seat or valve guide cutter in applications with a 5/16" valve.

Spring Seat Cutter - 1.440" Spring Seat O.D. .560" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.440" outer diameter while reducing the outer diameter of the valve guide to .560".

Spring Seat Cutter - 1.580" Spring Seat O.D. .560" Guide O.D.; This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.580" outer diameter while reducing the outer diameter of the valve guide to .560".

Lifter Bore Grooving Tool for .842" Lifter Bores; The COMP lifter bore grooving tool cuts a groove into the lifter bore which ensures pressurized oil is fed between the lifter and camshaft. Developed by NASCAR engine builders, this tool reduces camshaft and lifter wear. For .842" bores.