Part Number: K10091. 1x Ferrea K10091 Valve Lock (per lock). The Ferrea K10091 Valve Locks are engineered for the 2008–2015 Mitsubishi Lancer Evolution X equipped with the 2.0L 4B11T engine. Designed to withstand high RPM and aggressive valvetrain loads, the K10091 valve locks are compatible with Ferrea 7° titanium retainers, such as the E11089.
