OS Giken Lexus IS-F, IS-350, IS-250 SuperLock LSD The OS expanded rear differential

The OS expanded rear differential cover is made of cast aluminum and is designed to aid in additional fluid capacity

Lexus IS-250 (2014+) - GSE21 4GR-FSE V6

Subaru WRX STi (GD/GRB) - EJ25

Fitment for Nissan Z34 370Z requires replacing RH Output Shaft with another LH Output Shaft Nissan PN 38220-1NC1B/JK01B x1 (Installation requires PN 38220-1NC1B/JK01B x2 total)

Quad Plate Clutch Assembly with Flywheel

OS Giken Lexus IS-F, IS-350, IS-250 SuperLock LSD The OS expanded rear differentialThe OS Giken Super Lock LSD uses our patented pressure ring design that allows for smooth, progressive locking. This design is a spline through side gear design that allows for fitment of more friction plates (up to 2x as many as competitors versions). All components are chemically heat treated for maximum durability All components are constructed from a high grade steel alloy Gears are raw forged for maximum strength Clutch disks are precision