OS Giken 1.5-way superlock LSD for Evo 1-10 RS diff. Also fits DSM, Galant VR4, Lancer GSR, Lancer RalliArt, and Eclipse Talon. This Spec-S LSD is designed to suit a wide range of applications including street, drag and club racing.

Ramps – 25/38
Lock Timing – 336
Total Plates – 20
Preload – 10S

We like the OS units for their smooth application of lock, and their good street manners while also being perfect for track and rally applications. A true all-rounder.

1.5-way means full locking under acceleration with less aggressive locking under deceleration.