Cusco LSD RS 1.5-Way Only Rear Spec-F
2017–2026 Toyota 86 / Scion FR-S / Subaru BRZ (ZN8 Chassis)
LSD 6C1 VT15
Overview:
The Cusco LSD RS 1.5-Way Only Rear Spec-F is a high-performance limited-slip differential designed specifically for the rear axle of Toyota 86, Scion FR-S, and Subaru BRZ models from 2017 through 2026. Engineered for enthusiasts seeking improved traction and handling, this LSD enhances your vehicle’s cornering stability and throttle response, making it ideal for spirited street driving and track use.
By replacing the factory differential with this precision-engineered unit, you’ll experience better power delivery to the rear wheels, reduced wheel slip, and enhanced control during aggressive driving maneuvers. The 1.5-way design provides smooth engagement when accelerating and controlled lockup under deceleration, improving overall drivability and vehicle balance.
Key Features:
The Cusco LSD RS 1.5-Way Only Rear Spec-F offers advanced technology and construction to optimize your GR86 or BRZ’s rear-wheel performance:
- 1.5-way limited-slip differential tuned for rear axle use, providing progressive lockup on acceleration and controlled lockup on deceleration.
- Spec-F tuning tailored specifically for the 2022+ Toyota GR86 and Subaru BRZ (ZN8 chassis) for optimal traction and handling balance.
- Durable internal components designed to withstand high torque and aggressive driving conditions.
- Improves corner exit traction and reduces wheel spin compared to open differentials.
- Enhances throttle response and vehicle stability during spirited driving and track sessions.
- Precision engineering ensures smooth engagement without sudden lockup, maintaining drivability in daily use.
- Direct fitment for rear differential housing with no modifications required.
Construction & Design:
Cusco’s LSD RS 1.5-Way Only Rear Spec-F is crafted with high-quality materials and precision machining to ensure durability and consistent performance. The internal clutch packs and gear components are engineered to provide reliable limited-slip action while minimizing noise and vibration. This differential is designed to fit directly into the factory rear differential housing of the specified Toyota and Subaru models, maintaining OEM fitment and reliability.
The 1.5-way design means the differential locks progressively when accelerating, delivering improved traction, and also provides partial lockup when decelerating, which helps stabilize the vehicle during trail braking and corner entry. This balance makes it well-suited for both street and track environments.
Installation & Fitment:
This Cusco LSD is a direct bolt-in replacement for the rear differential of the following vehicles:
- 2017–2020 Toyota 86
- 2013–2020 Subaru BRZ
- 2013–2016 Scion FR-S
- 2022–2026 Toyota GR86
- 2022–2026 Subaru BRZ
No cutting, drilling, or special tuning is required for installation. It uses the factory mounting points and fits seamlessly into the OEM rear differential housing, allowing for a straightforward upgrade that maintains factory reliability and ease of service.
What's Included:
- Cusco LSD RS 1.5-Way Only Rear Spec-F limited-slip differential unit
- Installation hardware as required
- Instructions for proper installation and break-in procedures
Ideal For:
This limited-slip differential is ideal for drivers who want to improve their Toyota GR86, Subaru BRZ, or Scion FR-S’s handling and traction without sacrificing daily drivability. It suits:
- Performance enthusiasts seeking enhanced cornering and throttle response
- Track day drivers requiring better rear traction and vehicle stability
- Owners looking to upgrade from an open differential for spirited street driving
- Anyone wanting a reliable, durable LSD tailored specifically for their chassis
