What is the difference between a 1-way and a 2-way LSD?

A 1-way LSD primarily locks during acceleration, improving traction when you're on the throttle. A 2-way LSD locks during both acceleration and deceleration (engine braking), which can offer more stability during braking and corner entry but may feel more aggressive. This model is the 1-way version.

What type of fluid should I use with this differential?

It is critical to use a high-quality, LSD-specific gear oil. Using standard gear oil can cause the clutch plates to slip improperly or wear out prematurely. Always consult the manufacturer's recommendations or a professional mechanic for the correct fluid type and viscosity.

Does this LSD come with all necessary installation hardware?

This listing is for the Cusco Type-MZ LSD unit itself. It is recommended to inspect and replace any associated seals, bearings, or hardware during installation, as these are typically not included with the differential unit and are often considered wear items.

Specifications

Brand: Cusco
Part #: LSD 182 A
UPC: 4996338011862

Cusco LSD Type-MZ 1-Way (1&2 Way) Rear for Subaru 01-07 GDB / 11-14 GVB

Name: Cusco LSD Type-MZ 1-Way (1&2 Way) Rear for Subaru 01-07 GDB / 11-14 GVB
Brand: Cusco
SKU: cusco-cusco-lsd-type-mz-1-way-1-2-way-rear-for-subaru-01-07-gdb-11-14-gvb-t14-102315
Price: 1420.80 USD
Availability: BackOrder

$1420.80

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Cusco LSD Type-MZ 1-Way Rear for Subaru 01-07 GDB / 11-14 GVB. Improves traction and cornering grip.

Key Features

Fits 2001-2007 Subaru Impreza WRX STI (GDB) and 2011-2014 Subaru Impreza WRX STI (GVB).
Cusco Type-MZ 1-way clutch-type limited-slip differential.
Enhances traction and stability during acceleration.
Helps prevent wheel spin on uneven surfaces.
Designed for improved cornering grip and handling performance.
Popular upgrade for performance-oriented Subaru models.

This differential is specifically designed for the 2001-2007 Subaru Impreza WRX STI (GDB chassis) and the 2011-2014 Subaru Impreza WRX STI (GVB chassis).

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About this part

Product Details

This is the Cusco Type-MZ 1-way limited-slip differential (LSD) for the rear of your 2001-2007 Subaru Impreza WRX STI (GDB chassis) and 2011-2014 WRX STI (GVB chassis). If you're looking to get more grip out of your Subaru, especially during spirited driving or track use, an LSD is a key component. It helps put power down more evenly to both rear wheels, preventing one wheel from spinning freely when traction is uneven.

The Type-MZ is a clutch-type LSD, and this version is a 1-way unit. In a 1-way LSD, the locking effect primarily happens during acceleration. This means when you're on the throttle, the differential locks up, sending torque to both rear wheels and improving traction and stability. When you let off the throttle or coast, it acts more like an open differential, which can make the car feel a bit more predictable and less prone to oversteer on corner entry. Cusco is well-known for their performance drivetrain parts, and the Type-MZ is a popular choice for drivers who want a noticeable improvement in how their car handles hard acceleration out of corners.

This unit is designed as a direct replacement for your factory differential, though professional installation is highly recommended due to the complexity of differential work. You'll want to ensure you have the correct differential fluid for LSDs, as using the wrong type can damage the clutch plates. This is a significant upgrade for anyone looking to maximize the performance and handling capabilities of their Subaru WRX STI.