Seat, C630, 1.634” OD x 1.220” ID x 0.434” THK

TITANIUM valves require the use of Kibblewhite® Nickel Aluminum Bronze valve seat inserts.This premium copper based alloy is designed specifically for use with titanium valves. These seats are the product of a 2-year Kibblewhite® R&D effort during which we recorded and verified results with 4&5 valve singles, domestic and foreign sport compacts, multi valve and single cylinder street bikes, as well as British and European 4strokes. In every one of our tests for wear, thermal conductivity, and machinability, the seats surpassed the standard we set for success.
Thes seats have been used successfully with titanium valves in drag race, road race, desert race, motocross, and land speed racing. The seats are tall, have ample material on the ID for shaping, and are offered in several sizes making them truly universal in application. The ODs have a smooth surface finish that offers maximum contact with the head counterbore for optimum heat transfer, and a generous radius on the leading edge to prevent galling during installation.