Supertech BMW M50/M52/S50/S52 Inconel Exhaust Valve - +1mm Oversize - Set of 12

Supertech BMW M50/M52/S50/S52 Inconel Exhaust Valve - +1mm Oversize - Set of 12Supertech Performance BMEVI 1031S BMW S42 M42 M50 S50 M52 S52 M54 Exhaust valve Set of 12 Specs: Head Diameter 31. 50mm (+1. 0 over) Length 105. 65mm Material Inconel Stem Diameter 5. 96mm Note: To be used with KPR 6S 7. Supertech High Performance Race Engine Valves features: 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

Supertech Performance BMEVI-1031S BMW S42 / M42 / M50 / S50 / M52 / S52 / M54 Exhaust valve

• Head Diameter - 31.50mm (+1.0 over)
• Length - 105.65mm
• Material - Inconel
• Stem Diameter - 5.96mm

Supertech High Performance Race Engine Valves features:

• 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 with chromed stems, having less friction between stem and guide.
• Valve seat surface is harder with the nitrided layer, lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Matches any kind of seats (nodular iron seats, steel powder metal seats, hard aluminum-copper seats or beryllium copper seats).
• Higher rpm's engines take full advantage of all previous features. 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.
• The nitrided layer is adhered to the base material at a microscopic level, so does not"flake" or brake when the valves bend due to impacts with the pistons.
• The Black Nitride applies to the whole valve while the chrome coating is only applied to the stem.

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