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Supertech Black Nitride Intake Valves | 2002-2021 Subaru WRX & STI EJ20/EJ25

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Supertech

Supertech Black Nitride Intake Valves | 2002-2021 Subaru WRX & STI EJ20/EJ25

PART#
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Email - sales@maperformance.com

Phone 1-888-627-3736



$ 17.09   $ 23.73
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Black Nitride Intake Valves by Supertech

Supertech Performance uses their experience of more than 20 years in the manufacturing of racing valves, do intensive testing and work very closely with many engine builders in order to continuously improve and provide the market with the best possible product for every application. High flow rates, durability and quality are of great concern to Supertech Performance.

Black Nitride Coating

This is a hardening treatment that even though it is not widely used as the chrome coating, it has several benefits and is becoming very popular, mainly for European and Japanese applications. 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. Value 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).

Features

  • Constructed specifically for each application
  • Strict tolerances ensure the highest quality fitment
  • Superfinishing reduces surface roughness and increases flow

Benefits

  • Extremely durable
  • Great flow characteristics

Applications

  • 2002-2014 Subaru WRX
  • 2004-2021 Subaru STI

What's In The Box?

  • Intake Valve(s)
    dependent on quantity selected

Warranty

  • No Warranty

Black Nitride Intake Valves by Supertech

Supertech Performance uses their experience of more than 20 years in the manufacturing of racing valves, do intensive testing and work very closely with many engine builders in order to continuously improve and provide the market with the best possible product for every application. High flow rates, durability and quality are of great concern to Supertech Performance.

Black Nitride Coating

This is a hardening treatment that even though it is not widely used as the chrome coating, it has several benefits and is becoming very popular, mainly for European and Japanese applications. 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. Value 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).

Features

  • Constructed specifically for each application
  • Strict tolerances ensure the highest quality fitment
  • Superfinishing reduces surface roughness and increases flow

Benefits

  • Extremely durable
  • Great flow characteristics

Applications

  • 2002-2014 Subaru WRX
  • 2004-2021 Subaru STI

What's In The Box?

  • Intake Valve(s)
    dependent on quantity selected

Warranty

  • No Warranty

Customer Reviews

Based on 2 reviews
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t
timothy v.
They work

Great valves. They don’t like it when your AVCS locks and Decide to have strength contest with the piston head. Spoiler, the piston won and I’m buying these valves for the second time 🤦‍♀️

J
Jeremy
Best Bang for your buck

Easy installation at the machine shop, will have power numbers here shortly. Went from stock heads to supertech valves, ferrea valve springs and retainers, ported heads in a v6 sti ej207. 10/10 would recommend buying for +400

MAP Limited Lifetime Warranty

1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

For warranty evaluation please create a support ticket via this form Click Here For Customer Service.