Set of (8) 1.94" Head diameter intake and (8) 1.50" Head Diameter exhaust stainless steel Street Performance valves for Chevrolet small block engines. P/N HPV35 (exh) and HPV34 (int) or Elgin equivalent. Valve features include: EV-8 fire-forged and hardened stainless steel - 1-keeper groove stock 4.930" overall length 11/32" stock stem diameter 0.250 tip length hardened tip, hardened stem 6500 RPM rated From Elgin Industries Elgin, IL. USA