COMP Cams Engine Valve Spring Seat Cutter 4720; Carbide 1.580. Cutting Tip Material: Carbide Outer Diameter: 1.580 Guide Cutting Diameter. PerformanceParts is an authorized reseller of COMP Cams. All items will be declared as actual value, we do not mark as gift or at a reduced value. Some items cannot be combined due to size or weight. Items must be in the original packaging. For your protection, we recommend insuring the package for the full value. Please provide pictures if possible (for both the item and the packaging). If you have any questions or concerns regarding the item, please contact our customer service department. To return an item, please follow the steps below. Wait for an RGA number to be issued. This process may take up to 5 days. All instances of fraud are referred to IC3, as well as state and local authorities, and will be prosecuted. Monday – Friday 8AM to 6PM Central Standard Time.