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Brand New Supertech Performance Black Nitride Dished Face Valves for the Audi & Volkswagen 1.8T AEB 20v Engines.
the best materials are used in the creation of Supertech Performance
valves, ready to handle whatever abuse you can throw at them. Perfect
for forced induction applications and high revving naturally aspirated
Complete Set of 20 Valves (12 Intake and 8 Exhaust Valves)
Supertech Part # AIVN-1103 - Intake - STD Size - Dished Face
Intake Valve Specs - 26.90mm Head Diameter - 5.96mm Stem Diameter - 105.10mm Length
Supertech Part # AEVN-1103 - Exhaust - STD Size - Dished Face
Exhaust Valve Specs - 29.90mm Head Diameter - 5.94mm Stem Diameter - 103.90mm LengthBenefits for Black Nitride Coating includes: -
The micro hardness is higher than the stainless steel base material,
keeping good ductility beneath the hard nitride layer (micro hardness is
800hv minimum) - Surface finish is smoother than with chromed valve stems, having less friction between the stem and guide. -
Valve seat surface is harder with the nitride 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 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 nitride layer is adhered to the base material at microscopic level,
so it will 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. - All valves are swirl polished, have stem undercut, a hardened tip, and more.
Please ask any questions you may have prior to offerding. We offer a full line of high performance auto parts.