Most high performance engines today require the use of larger-than-stock diameter valve springs. This 1.440" 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.1.440" O.D..630" Cuts Guide

Product Features:

• Cuts spring seat to 1.440" O.D.
• Cuts guide to .630"
• Other seat cutters available in many sizes from 1.350" to 1.810" O.D.