COMP Cams Spring Seat Cutter, Cuts Pocket to 1.440. 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. COMP Cams 4733 Valve Spring Seat Cutter, Carbide, 1.44 In. Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years.