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Supertech Steel Inlet Valve Kit – Mini Cooper S/JCW N14

£205.44

Description

Supertech Steel Inlet Valve Kit – Mini Cooper S/JCW N14

Made as a one piece forged valve for higher strength and reliability, Supertech use mostly EV8 (21-4N) for Intake and Exhaust valves but there are other alloys that we use along with different heat treatments to manufacture valves for different applications.

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 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).

Engine Type Mini Cooper R56 turbo

Citroen DS3 Racing

Peugeot 207 & 308 GTi

R56 / EP6  / Prince 1.6 16v Turbo

Head Size 28.8mm (OE)
Stem Diameter 4.96mm
Length 105.8mm
Material Black nitrided stainless steel

These valves require the use of Supertech Valve locks. The locks (and their cost) have been included in this item and it’s price.

Additional information

Weight 5 kg
Make Model Year Engine
Make Model Year Engine
Mini Cabrio R56 (2009 - 2015) Cooper S 1.6T (N14)
Mini Clubman R55 (2007 - 2014) Cooper S 1.6T (N14)
Mini Clubman R55 (2007 - 2014) JCW 1.6T (N14)
Mini Countryman R60 (2010-2016) Cooper S 1.6T (N18)
Mini Countryman R60 (2010-2016) JCW 1.6T (N18)
Mini Coupe 2011 - 2015 Cooper S 1.6T
Mini Coupe 2011 - 2015 JCW 1.6T
Mini Hatchback R56 (2006 - 2013) Cooper S 1.6T (N14)
Mini Hatchback R56 (2006 - 2013) JCW 1.6T (N14)
Mini Paceman R61 (2012 - 2016) Cooper S 1.6T (N18)
Mini Paceman R61 (2012 - 2016) JCW 1.6T (N18)
Mini Roadster 2012 - 2015 Cooper S 1.6T
Mini Roadster 2012 - 2015 JCW 1.6T
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