These are one (1) set or eight  (8)) new  intake valves made from titanium. These valves are being sold at a reasonable price for a quick sale..The selling code being used on these valves is ZM.  The valves measured  at 6 mm. stems, bead groove with a head size measuring close to 2.250". The overall length is approximately 5.800".  The valves came from a Championship Nascar team  and these valves were from New old stock from early  2000. The valves pictured are the one's you will receive. We appreciate your interest in our store and hope we can do business together. Thanks for looking! Please add us to your favorites.