NEW Stainless Steel Racing Valves for D16 series 
 
Racing Valve Features:

• One piece forged stainless steel, SAE EV8 (UNS S63008)
• Heat treated to obtain hardness and ductility for street performance or racing
• Black Nitrided hardening treatment--very popular for Japanese applications
• The nitrided layer adheres to the base material at a microscopic level and does not flake or break when the valves bend due to impacts with the pistons
• The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer (microhardness is 800HV minimum)
• Surface finish is smoother than chromed stems--that means less friction between stem and guide
• Valve seat surface is harder with the nitrided layer--that means they last longer
  with lead free fuels, alcohols, nitro or other explosive mixes
• Matches any seat (nodular iron, steel powder metal, hard aluminum-copper, or beryllium copper )
• All valves are swirl polished, have stem undercut and a hardened tip
• All valves are brand new

Remember that the higher the engine speed the bigger the power loss due to internal engine friction! The black nitride layer reduces this power loss due to less valve-guide friction.

Exceptional for street performance.

Simply a must have for turbo and NOS!

Complete set: Includes 8 intake and 8 exhaust valves.