Valve SeatCaracteristicas: Copper based material designed specifically for use with titanium valves in high performance applications Give the seat excellent thermal characteristics as well as resistance to corrosion and wear These seats are the result of a two year KPMI R&D effort during which we recorded and verified results with 4 and 5 valve singles, multi cylinder street bikes, and British and European 4 strokes In each test the wear, thermal conductivity