COMP Cams 4721 - Seat Cutter, for GM Vortec Head

Most high performance engines today require the use of larger-than-stock diameter valve springs. This 1.350" Spring Seat Cutter for installing single springs on GM Vortec Heads without hardened spring seats 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.

Cuts spring seat to 1.350" O.D.; Cuts guide to .775"; Cuts seat to install larger springs and hardened spring seats on GM Vortec heads without hardened spring seats; Other seat cutters available in many sizes from 1.350" to 1.810" O.D.;