Cusco RS Rear LSD 1.5 Way – Subaru WRX STI (R180 Differential, 02–21)

Overview
The Cusco RS Rear LSD 1.5 Way is engineered for serious competition, featuring a high-tension chrome molybdenum steel housing and gears for maximum durability. With large oil windows for increased fluid flow and Cusco’s original groove-cut technology, this LSD delivers enhanced stability, efficiency, and longevity. Ideal for both street and motorsport applications, it offers consistent traction and superior control under demanding conditions.

Key Features

• 1.5-way operation: full engagement during acceleration, partial during deceleration
• Convertible to 2-way operation by rotating the center spline
• Coil springs provide smoother, faster engagement and higher durability than cone plates
• Customisable with adjustable clutch pack order and spring tension presets
• Large oil windows improve lubrication and cooling under load
• High-strength chrome molybdenum steel housing and gears

Specifications

• LSD Adjustability: 1.5-way / 2-way convertible
• Construction: Chrome molybdenum steel housing and gears
• Technology: Cusco groove-cut clutch plate design

What’s Included

• 1 x Cusco RS Rear LSD (R180 differential)
• Installation instructions

Vehicle Compatibility

• 2004–2007 Subaru Impreza WRX STI Sedan (GD, GDF)
• 2008–2014 Subaru Impreza WRX STI Hatchback (GR, GRB, GRF)
• 2011–2014 Subaru Impreza WRX STI Sedan (GV, GVB, GVF)
• 2005–2009 Subaru Legacy Sedan/Wagon 2.5L Turbo & NA (BL/BP)
• 2015–2021 Subaru WRX STI (VA, VAF)