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OS Giken Toyota GT86/Scion FR-S Super Lock LSD OS Giken OSGTY421-HA
OS Giken Toyota GT86/Scion FR-S Super Lock LSD OS Giken OSGTY421-HA
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OS Giken Toyota GT86/Scion FR-S Super Lock LSD

OS Giken
OSGTY421-HA
Differentials
Out of stock
$ 1,450.00

SKU: TY421-HA

OS Giken Toyota GT86 Scion FR-S Subaru BRZ Super Lock LSD (TY421-HA 2013-2021)

The OS Giken Super Lock LSD TY421-HA is a 2-way clutch-type limited slip differential built for Toyota GT86 Scion FR-S and Subaru BRZ models spanning 2013 to 2021. It replaces the stock open differential to distribute power evenly to both rear wheels enhancing straight-line acceleration stability and cornering traction. Track and drift drivers rely on this LSD for consistent performance under high loads.

Key Features

  • 2-Way Locking: Engages full lock on acceleration and deceleration sending power to the wheel with grip
  • High-Capacity Clutch Pack: 8 initial torque plates plus 8 reaction plates deliver consistent torque bias and resist wear
  • Shot-Peened Gears: SCM415 alloy steel gears with carburizing treatment handle extreme torque while minimizing noise
  • Reinforced Case: High-tensile ductile iron housing withstands racing stresses without flexing
  • Direct Bolt-In Design: Matches OEM dimensions and spline count for seamless swap with stock 4.1 final drive

Product Notes

  • Use OS Giken LSD gear oil or equivalent 75W-90 GL-5 synthetic for clutch pack longevity
  • Perform 500km break-in with varied throttle and speeds avoiding full lock
  • Heavy precision component handle with care during unpacking

Installation Notes

  • Professional installation recommended.
  • Drain OEM fluid remove stock differential and transfer internals to LSD carrier
  • Compatible with OEM axles mounting bolts and 4.10 ring gear

This Part Fits

Year Make Model Submodel
2013-2016 Scion FR-S Base
2013-2017 Subaru BRZ Limited
2013-2017 Subaru BRZ Premium
2013-2020 Subaru BRZ tS
2015 Subaru BRZ Series.Blue
2016 Subaru BRZ Series.Hyperblue
2017-2021 Toyota 86 Base
2017 Toyota 86 Special Edition
2017-2020 Toyota 86 GT
2018-2020 Toyota 86 Hakone Edition

Why Choose OS Giken?

  • Japanese specialist in clutch LSDs with decades of drifting competition wins
  • Hand-built units ensure every LSD meets racing standards
  • Engineered for ZN6 platform with exact tolerances for reliability

Frequently Asked Questions

  • Q: Does TY421-HA fit 2018-2021 Toyota 86 and Subaru BRZ?
    A: Yes direct fit for all ZN6 chassis 86 FR-S BRZ models 2013-2021 regardless of submodel or transmission
  • Q: What materials are used in construction?
    A: Ductile iron case SCM415 gears and high-friction clutch plates built for high horsepower abuse
  • Q: What warranty coverage applies?
    A: 12 months from purchase date covers manufacturing defects with proof of proper installation and oil

Shipping & Handling

  • Method: UPS Ground / FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Original OS Giken carton 16 x 14 x 14 inches
  • Weight: 44 lbs

Request For Information

Have questions about OS Giken Toyota GT86/Scion FR-S Super Lock LSD? Fill out the form below and we'll get back to you by the next business day.
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Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

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