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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".

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".