New aftermarket OS Giken Super Lock LSD rear differential for Late NA and NB Mazda Miata. This OS Giken LSD features 28 friction plates with a patented lock timing system which achieves complete lock in a progressive, smooth, and quiet manner. All components are chemically heat treated and made from high grade steel alloy. The LSD case is machined from a single billet piece. OS Giken LSD is intended for street or track use. Part number MZ072-HA. Fits 1990-1993. California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov Photographs are stock photos only and the purchased product may vary. Photographs of the purchased product can be emailed upon request.