Ferrea 5000 Series Exhaust Valve - Honda D16Z6/D16Y5/D16Y7/D16Y8 Stock Size - Set of 8 - F5512The 5000 Series Hi Performance Valves have become the alternative for performance engine builders that use our competitors street or performance valve. These valves are machined in our 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