Made in UK Plasma hardened Exhaust valve for A10 cast iron cylinder head , can be used as oversize valve for A7 heads cast iron and alloy, using standard A7 springs, caps and collets.
Valve is hardened using the "Pulsed Plasma Nitriding." process, this gives the valve resistance to wear and anti friction properties , when this type of valve is matched with our Colsibro material valve guides , you have the best combination for valve and guide, for performance and longevity
