Brand: Airflow Research (AFR) Manufacturer's Part Number: 7633-8 Part Type: Valves Product Line: AFR Inconel Valves Automotive Fittings Part Number: AFR-7633-8 Valve Position: Exhaust Exhaust Valve Head Diameter (in.): 1.880 in. Exhaust Valve Head Diameter (mm): 47.752mm Exhaust Valve Stem Diameter (in.): 0.344 in. Exhaust Valve Stem Diameter (mm): 8.71mm Exhaust Overall Valve Length (in.): 5.450 in. Exhaust Overall Valve Length (mm): 138.430mm Undercut Stem: Yes Swirl-Polished: Yes Valve Tip Length (in.): 0.250 in. Valve Tip Length (mm): 6.350mm Valve Material: Inconel Lock Groove Quantity: 1-groove Lock Groove Style: Conventional Valve Head Style: Dished Valve Seat Width (in.): 0.060 in. Quantity: Sold as a set of 8. Description: AFR Inconel valves provide your cylinder head with the proper flow needed to keep your engine running efficiently. Inconel alloys are oxidation/corrosion-resistant materials well suited for service in extreme environments subjected to pressure and heat. Order the AFR Inconel valves designed to fit your application.