Welcome to Prestige Motorsports Web Store.
New items are being added every day, do check back for the latest listings.Prestige Motorsports have over 25 years experience in the Motorsport world, the business provides a range of services from original Ford Motorsport 909 parts supplier to car preparation. With our ever increasing stock levels of new parts, we can offer a one-stop Ford preparation Motorsport parts shop, from a single part to a complete car build, we are happy to help with information or technical support from our ex-Ford Motorsport engineers. Having worked with many of the WRC drivers and Factory teams, Prestige Motorsports are the only company with the knowledge and Ford Motorsport background to help you with the correct parts you need, with an extensive range of 909 parts manufactured in the UK.
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Subaru impreza STI Motorsport inlet valve set
ADVERT ID: 664
Number of Times
Subaru impreza Motorsport inlet Valve set
8 valves in the set Black Nitriding:
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 micro-hardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrated layer (micro-hardness 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 nitrated 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).
Head Size 35mm (OE)
Stem Diameter 5.46mm
Material Black nitrated stainless steel
Please contact for shipping prices outside mainland UK we do offer a worldwide shipping service, Don’t hesitate to get in contact about any questions or queries you may have about this item.
shipping cost is for UK mainland only
PLEASE NOTE THAT THIS ITEM WILL HAVE VAT ADDED AT CHECKOUT FOR UK AND EUROPEAN BUYERS.