What is the main benefit of a 1.5-way limited-slip differential?

A 1.5-way LSD provides locking force during both acceleration and deceleration. This helps to improve traction and stability, especially during cornering, by managing power delivery more effectively and reducing understeer on corner exit.

What makes the Cusco RS series LSD unique?

The Cusco RS series uses a unique clutch plate design that combines cone-type and plate-type clutches. This configuration offers smoother initial engagement and more aggressive locking under throttle, providing a predictable and controlled driving feel.

What is recommended for installing this differential?

Installation of a limited-slip differential is a complex procedure. It is highly recommended to have this part installed by a professional mechanic who is experienced with drivetrain components, or to carefully follow the manufacturer's detailed installation instructions.

Specifications

Brand: Cusco
Part #: LSD 193 LT15
UPC: 4996338006998

Cusco LSD RS 1.5-Way(B-Size) Lexus 09-19 IS250/350 / 10-19 GS350/450h

Name: Cusco LSD RS 1.5-Way(B-Size) Lexus 09-19 IS250/350 / 10-19 GS350/450h
Brand: Cusco
SKU: cusco-cusco-lsd-rs-1-5-way-b-size-lexus-09-19-is250-350-10-19-gs350-450h-t14-412394
Price: 1776.00 USD
Availability: BackOrder

$1776.00

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Cusco LSD RS 1.5-Way(B-Size) for Lexus 09-19 IS250/350 / 10-19 GS350/450h. Improves traction and handling.

Key Features

Fits Lexus 2009-2019 IS250/350 and 2010-2019 GS350/450h.
Features a 1.5-way limited-slip differential design for improved traction during acceleration and deceleration.
Utilizes a unique clutch plate configuration combining cone and plate types for smooth engagement and controlled locking.
Helps reduce understeer on corner exit by biasing torque to the outside wheel during deceleration.
B-size unit specifically engineered for the listed Lexus models.

This Cusco LSD is designed for the Lexus IS250, IS350, GS350, and GS450h models within specific year ranges. Please verify fitment for your exact vehicle.

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About this part

Product Details

The Cusco RS 1.5-way limited-slip differential (LSD) is built with a unique clutch plate design that offers a distinct advantage for performance driving. This B-size unit is specifically engineered for a range of Lexus models, including the 2009-2019 IS250 and IS350, and the 2010-2019 GS350 and GS450h. Its 1.5-way operation means it provides locking force during both acceleration and deceleration, which helps to manage power delivery more effectively and improve overall vehicle stability during cornering.

What sets the RS series apart is its clutch plate configuration. Unlike traditional LSDs, the RS features a combination of cone-type and plate-type clutches. This design allows for smoother engagement during initial turn-in and more aggressive locking under throttle, offering a predictable and controlled feel. The 1.5-way setting is particularly beneficial for spirited driving, as it helps to reduce understeer on corner exit by biasing torque to the outside wheel when you lift off the throttle. This can lead to faster lap times and a more connected driving experience.

Installation of a limited-slip differential is a significant upgrade for any performance-oriented vehicle. It requires careful attention to detail and often involves specialized tools. We recommend consulting a professional mechanic or referring to the manufacturer's installation manual for proper setup and fluid requirements to ensure optimal performance and longevity of your new Cusco LSD. This differential is designed to work with the specific drivetrain of the listed Lexus models, ensuring a direct fit for those seeking enhanced traction and handling capabilities.