40mm Pro Valve Seats are made of Nickel Aluminum Bronze material for extra long life in performance engines. With track proven results the machine-ability, longevity, and thermal conductivity far surpass the stock cast iron seats. We highly recommend upgrading to these seats for high boost (over 20 lbs) and all racing applications.
NOTE: These seats will need to be machined to work with your specific cylinder head and valve combinations. This will only work with all valves from stock size up to +2mm oversize. Sold individually.
Contact our Tech Support Line for further information at 928-575-2174.