This OS Giken Super Lock LSD for your Nissan 370Z / Infiniti G37 is the product of four years of extensive research and development. The OS Giken Super Lock LSD is a revolutionary design that has the ability to house up to 28 friction plates! This extraordinary number of plates drastically improves the locking force of the LSD and enables it to lock fully and completely. As an added benefit, less heat is generated in the fully locked mechanism allowing for unprecedented durability. Every OS Giken Super Lock LSD is made from the highest quality materials on the most precise machining equipment. The result is the best performing, most durable and reliable LSD available.