What is the main benefit of a 1-way limited-slip differential?

A 1-way LSD primarily locks under acceleration. This helps to improve traction by sending power to both front wheels when you're on the throttle, pulling the car through corners more effectively and reducing wheelspin.

What does the adjustable engagement (35 & 45 degrees) mean?

This refers to the cam angle inside the differential, which controls how aggressively it locks up. You can choose between two settings, 35 degrees for a less aggressive lock-up or 45 degrees for a more pronounced lock-up under acceleration, allowing you to tune the feel to your driving style.

Is this differential compatible with the factory transmission?

This Cusco LSD is designed to fit the factory transmission for the specified Subaru Impreza models. However, installation is complex and typically requires transmission removal and specialized tools. It is highly recommended to have this professionally installed.

Specifications

Brand: Cusco
Part #: LSD 184 F
UPC: 4996338011954

Cusco LSD RS-1way(35&45) Front GDB(C) GRB GVB STI Impreza

Name: Cusco LSD RS-1way(35&45) Front GDB(C) GRB GVB STI Impreza
Brand: Cusco
SKU: cusco-cusco-lsd-rs-1way-35-45-front-gdb-c-grb-gvb-sti-impreza-t14-249223
Price: 1420.80 USD
Availability: BackOrder

$1420.80

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Fits 2004-2007 Subaru Impreza. Cusco front clutch-type LSD improves traction and cornering performance.

Key Features

Fits 2004-2007 Subaru Impreza.
Cusco RS-1way clutch-type front limited-slip differential.
Adjustable engagement settings at 35 and 45 degrees.
Designed to lock under acceleration for improved traction.
Helps prevent wheelspin and enhances cornering grip.
Well-built unit for performance driving applications.

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About this part

Product Details

If you're looking to significantly improve your 2004-2007 Subaru Impreza's traction and handling, especially during spirited driving or track use, a limited-slip differential (LSD) is a key upgrade. This Cusco RS-1way clutch-type LSD is specifically designed for the front of your STI, offering a noticeable change in how the car puts power down out of corners.

The RS series from Cusco uses a unique cam mechanism that allows for adjustable engagement. This particular unit offers settings for both 35 and 45 degrees of lock-up, giving you the flexibility to tune how aggressively the differential engages. A 1-way LSD primarily locks under acceleration, which helps to prevent wheelspin and pull the car through the turn more effectively. This makes it a popular choice for performance driving where maximizing grip on throttle is crucial. The clutch-type design means it uses friction plates to create the locking action, providing a direct and responsive feel. It’s a well-built unit designed to handle the stresses of performance driving.

Installation of a front differential is a more involved job than a rear unit, often requiring removal of the transmission and specialized tools. It's recommended to have this professionally installed or to consult detailed service manuals. This Cusco LSD is a solid option for Impreza owners serious about enhancing their car's performance capabilities on the track or during aggressive street driving.