New Spec Aluminum Flywheel Stage 3+ for Early NA Mazda Miata. This Spec flywheel is CNC manufactured at a .001 tolerance and are SFI certified. The Spec flywheel weighs 9lbs which is lighter than the stock and allows for quicker acceleration. Part number SZ61A. 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.