The 5000 Series Valves have become the alternative for performance engine builders that use competitors "street" or "performance valve". These valves are produced in Ferrea's CNC centers allowing tight tolerances and cost-effective design. They feature a one-piece forging made from stainless steel, a special heat treatment process, hard chrome stems, and hard tip. Most applications are available in an undercut stem and dished head, while other applications are available in straight stem and flat head. These valves provide maximum value for the dollar, and are designed for Street Performance engines, mildly modified Drag and Oval Track applications.Pit Stop USA offers Ferrea 5000 Series Hi Performance Exhaust Valve - SB Chevy - 1.600", 11/32" Stem Diameter, 5.010" Overall Length - (Set of 8) F5025-8 at low everyday prices. Be sure to check out all of our products from Ferrea Racing Components including Ferrea Racing Components 5000 Series Hi Performance Valves.