Valve Seat Each 1.6-1.7 Intake STD
NOT CURRENTLY AVAILABLE
These are Standard 1600 AND 1750 Intake seats.
They will work with both STD 42.5mm (1mm oversize) valves.
With regard to fitting oversize valves, the 42.5mm intake valves fit nicely on stock seats that are 43mm OD. Since the valve should have a .25-.5mm overlap beyond the 45 degree seating ring, there is plenty of iron seat left for the 15 degree top cut.
These are special alloy* racing seats.
*Modified M2 Tool Steel, which utilizes a blend of three types of carbide materials to provide outstanding wear resistance for valve seat insert application. Molybdenum and Tungsten carbides are both harder and more thermally stable than chromium carbides. They also form a carbide structure to impart more stability to the base material. Vanadium carbides are also added to provide greater wear resistance without affecting the machineability of the product. This Iron based insert allows for excellent heat transfer. T-series hardness run @ 42 Rc and is currently the industry choice when mated with premium or Inconel valves.