Description

CUSCO offers a complete range of high-performance Mechanical Limited Slip Differentials (LSDs) for the GR Yaris, designed to meet the needs of every driver—from aggressive street enthusiasts to professional competitors. Each series provides distinct lock-up characteristics and torque sensitivity, allowing for precise tuning of traction, cornering behavior, and overall drivetrain response.

Product Highlights

🏁 Mechanical Clutch-Type LSD Performance
All CUSCO LSDs utilize a durable multi-plate clutch design known for its consistent, predictable, and aggressive locking action, delivering maximum traction and driver control under power and deceleration.

🎛️ Tunable Lock-Up Characteristics
Choose from 1-Way (lock on acceleration only) or 1.5-Way (strong lock on acceleration, moderate lock on deceleration) to tailor the vehicle’s handling balance, corner entry stability, and exit traction.

⚙️ Two Performance Tiers: Standard & Spec-F

• Standard Series: Features a robust 3-5 kgf·m initial torque range, offering strong, immediate engagement ideal for spirited street driving and club-level track use.

• Spec-F Series: Engineered for competition with a more sensitive 2-4 kgf·m initial torque range, providing smoother, more progressive engagement for advanced drivers seeking maximum chassis adjustability on slicks or in high-grip conditions.

🔩 Direct Fit & Competition-Ready Construction
Designed as a direct replacement for the OEM differential. Built with high-grade materials and includes performance RS springs as standard for durability under extreme stress.

Product Lineup & Specifications

1. Standard Series (Initial Torque: 3-5 kgf·m)

Ideal for: Spirited Street, Track Days, Club Racing

1-Way LSD (Standard):

• Function: Lock on Acceleration Only

• Settings: 3.5° or 4.5°

• Product Code: LSD-1C7-A

• JAN Code: 4996338108753

1.5-Way LSD (Standard):

• Function: Strong on Accel / Moderate on Decel

• Settings: 3.5°/20° or 4.5°/20°

• Product Code: LSD-1C7-M15

• JAN Code: 4996338108760

2. Spec-F Competition Series (Initial Torque: 2-4 kgf·m)

Ideal for: Time Attack, Circuit Racing, Professional Competition

1-Way LSD Spec-F:

• Function: Lock on Acceleration Only (Refined Engagement)

• Settings: 3.5° or 4.5°

• Product Code: LSD-1C7-AT

• JAN Code: 4996338108791

1.5-Way LSD Spec-F:

• Function: Strong on Accel / Moderate on Decel (Refined Engagement)

• Settings: 3.5°/20° or 4.5°/20°

• Product Code: LSD-1C7-MT15

• JAN Code: 4996338108807

Selection Guide

🔍 Choosing Your LSD:

• For Street & Occasional Track: The Standard Series (3-5 kgf·m) offers robust, predictable lock-up that enhances traction without excessive sensitivity.

• For Dedicated Competition: The Spec-F Series (2-4 kgf·m) provides the nuanced, progressive engagement needed for maximum control on slicks and at the limit.

• For FWD Bias or Pure Traction Focus: Choose a 1-Way LSD.

• For Balanced AWD/RWD & Rotation Control: Choose a 1.5-Way LSD.

⚠️ Critical Installation & Setup Notes

• Professional Installation Required: Differential assembly and shimming are precision tasks. Must be installed by a qualified specialist.

• Specialized Fluid & Break-In: Requires CUSCO LSD oil or equivalent and a proper break-in procedure.

• Not a Maintenance-Free Part: Clutch packs may require service depending on use.