intake valve - 46mm for M10 - stainless steel Upgrade/Performance/Race These stainless steel valves are swirl-polished and are slightly back cut to improve flow. Performance improvement may be small but sometimes every little bit helps. Better price than stock valves. Picture is for visual reference only, valves will vary due to application. Price: $17.19   Quantity to Add:   CONTACT US AT BMWSALES@2002AD.COM 1-800-4-2002AD 909-629-1955 outside of the USA COPYRIGHT © 2002 AD, ALL RIGHTS RESERVED.