H.Drive Racing Limited Slip Differential (LSD), Precision Machined from High-Tensile Premium Grade Carburized Forged Chrome Nickel Moly Steel with good toughness and ductility, increased hardness penetration, and hardneability to a strong, tough, core, with high case-hardness. Limited Slip Differential (LSD) is an integral part of the cornering performance whether it is a two or a four-wheel-drive vehicle. H.Drive Racing Helical and Metal Limited Slip Differential (LSD) react faster and offer a wide range of adjustments to suit different driving conditions be it on the road or on the race circuit for your needs.