What is the difference between a 1-way and a 1.5-way LSD?

A 1-way LSD primarily locks during acceleration, helping to put power down. A 1.5-way LSD locks during acceleration and also has a degree of lock during deceleration, which can help stabilize the car during corner entry and exit. This Cusco unit is a 1.5-way design.

What else is needed for installation?

Installation typically requires specialized tools for differential work, including gear oil for proper lubrication. It's recommended to replace any seals and gaskets during installation. Refer to the manufacturer's installation guide for a complete list of requirements and procedures.

Will this LSD fit my manual or automatic transmission Impreza?

This Cusco LSD is designed for the front differential housing of the 2001-2007 Subaru Impreza. It is generally intended for manual transmission vehicles where front differential replacement is common for performance upgrades. Please verify compatibility with your specific transmission type.

Specifications

Brand: Cusco
Part #: LSD 180 C
UPC: 4996338017000

Cusco LSD RS1.5WAY (1 Way) Front For GC8 GDA Impreza BR9 BM9

Name: Cusco LSD RS1.5WAY (1 Way) Front For GC8 GDA Impreza BR9 BM9
Brand: Cusco
SKU: cusco-cusco-lsd-rs1-5way-1-way-front-for-gc8-gda-impreza-br9-bm9-t14-4312000
Price: 1420.80 USD
Availability: BackOrder

$1420.80

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Fits 2001-2007 Subaru Impreza. Cusco 1.5-way RS front LSD for improved traction and cornering.

Key Features

Fits 2001-2007 Subaru Impreza.
Cusco RS 1.5-way front limited-slip differential.
Designed to improve traction and cornering performance.
Locks more aggressively under acceleration than deceleration for predictable handling.
Robust internal mechanism built for performance driving.
Direct fit for GC8 and GDA Impreza chassis front differential housing.

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About this part

Product Details

If you're looking to get the most out of your 2001-2007 Subaru Impreza on the track or during spirited driving, a limited-slip differential (LSD) is a significant upgrade. This Cusco RS 1.5-way front LSD is designed to help put power down more effectively, especially when exiting corners. It works by locking the differential under acceleration and deceleration, helping to prevent wheel spin and improve traction. The 1.5-way design means it locks more aggressively under acceleration than deceleration, which can provide a more predictable feel during cornering for many drivers.

Cusco is well-known for its performance drivetrain components, and this RS series LSD is a popular choice for Subaru enthusiasts. It's built with a focus on durability and performance, featuring a robust internal mechanism that can handle the demands of performance driving. The 1.5-way engagement is a balance that many find ideal for track use, offering a noticeable improvement in grip without being overly intrusive during normal driving. Installation involves replacing the factory open or limited-slip differential with this unit, which typically requires specialized tools and knowledge of drivetrain components. It's a job best suited for experienced mechanics or those comfortable with complex driveline work.

This differential is designed specifically for the GC8 and GDA Impreza chassis, ensuring a direct fitment into the front differential housing. When installing, ensure all associated seals and fluids are replaced according to manufacturer recommendations to ensure proper operation and longevity. This upgrade is a substantial step towards a more capable and engaging driving experience for your Impreza.