OS Giken Lexus IS350 GSE21 (TCD) Super Lock LSD

Name: OS Giken Lexus IS350 GSE21 (TCD) Super Lock LSD
Brand: OS Giken
SKU: O002 TY391-HC
Price: 1850.00 USD
Availability: InStock

$1,850.00

SKU: O002 TY391-HC

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Description

The OS Giken TY391-HC is a Super Lock Limited Slip Differential (LSD) designed for enhanced traction and driving performance. It features a patented pressure ring design for smooth, progressive locking, and a spline-through-side-gear design allowing more friction plates. Constructed from high-grade, heat-treated steel alloy with raw-forged gears and precision-machined clutch disks, it offers durability and consistent performance. The billet-machined case, low preload with 100% progressive lock capability, and tunability for various applications make it a high-performance choice.

Fitment

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Specifications

Brand	OS Giken
Part Number	O002 TY391-HC

Videos

$1500 for a LSD?!?! Why the OS Giken Super Lock Limited Slip Differential is worth it!

How the OS Giken Differential Works and How to Tune it!

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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