valve spring retainers - titanium - M10 dual or single springs Performance/Race Titanium valve spring retainers are plenty strong but much lighter than stock steel retainers - this helps reduce reciprocating weight in high-revving engines. These fit both single and dual springs. These should be considered as a RACE ONLY part and inspected at regular intervals. If you're building a performance street engine consider using our Chromoly retainers. Price: $155.19   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.