L.S.D. refers to Limited-Slip Differential Gear, used in the centre and final-drive, differential-gear section of most automobiles. While standard "open-differential" is commonly used on mundane production vehicles to allow the rotational difference of outside and inside wheels, in motorsports application requires that the driving wheels transfer power to the road surface regardless of condition, surfaces, driving style, and automobile design weaknesses.

Cusco understands that the Limited-Slip Differential systems can affect the overall handling of the car, therefore also the chassis and suspension requirements and optimisation will also change accordingly. It is the cumulative overall design of every component of the car, which will determine the settings and needs of each of these items. This is why Cusco offers a full line of chassis bracing, suspension systems, and dynamic alignment correction components to set up a car to the best potential, Counting on each element to achieve the best balance, and closer to the goal of the driver and teams to win competitions, or provide more tactile road cars for the discerning owners.