Cusco LSD RS1.5 NA8 Miata

The Cusco RS 1.5-way limited slip differential (LSD) is built with a unique clutch plate design that offers a distinct advantage for your 1994-2005 Mazda Miata. Unlike traditional clutch-type LSDs, the RS series uses a combination of cone springs and clutch plates to provide a more progressive engagement. This means you get a smoother transition into locking, which is especially beneficial during cornering, helping to reduce understeer and improve overall handling balance. The 1.5-way design engages more strongly on acceleration than deceleration, giving you a predictable feel when you're powering out of a turn.

Cusco has engineered this differential with a focus on durability and performance. The internal components are made from well-built materials designed to withstand the stresses of spirited driving. The RS series also features a special surface treatment on the clutch plates to minimize initial break-in time and ensure consistent performance from the start. This unit is designed to fit directly into the factory differential housing, making installation more straightforward, though professional installation is recommended due to the specialized nature of differential work. You'll notice improved traction when accelerating out of corners, and a more stable feel during aggressive maneuvers.

This differential is a significant upgrade for any Miata owner looking to enhance their car's performance, especially for track days, autocross, or spirited canyon carving. It's important to note that when installing a new LSD, it's often recommended to use specific LSD-compatible gear oil to ensure proper function and longevity. Refer to the manufacturer's installation instructions for detailed guidance on break-in procedures and fluid recommendations.