Casting a valve seat with the combination of alloys required for today’s fuels is not possible, and only the so-called Powdered Metal Technology facilitates to blend these alloys creating a high density seat with exceptional wear resistance, machinability, and thermal qualities. The KPM valve seats are made from such materials which provide good uniform hardness and resistance to microwelding, wear, and recession. They are compatible with all types of fuel blends, resists corrosion and burning, and are machinable with standard tooling. They have been thoroughly tested on the track and street, in high RPM multi-valve applications, high spring load V-twin applications, with leaded and unleaded gasoline, ethanol and methanol. In each case they have performed flawlessly, making them the seats of choice for cylinder head builders everywhere.