Seats, Ni Al Bronze

Installation Notes: These seat size recommendations are based on machining the seat counterbore in the head after the OEM seat has been removed. This insures that the counterbore is true, and will give optimum valve seat to head surface contact and interference fit. This is critical for proper valve seat stability, heat transfer, and retention. The cylinder head should be heated to approx. 250° just prior to seat installation. This will expand the seat bore for easier seat installation. The seat may be cooled as well, to additionally reduce the amount of interference fit at the time of installation. Be sure to install the seat with the radiused edge facing down.