Mazda Rotary Powered by 13B-MSP Oil Filler Cap in Silver Gunmetal Billet Aluminum for MAZDA RX7 RX8 RX3 R1 R2 R3 12A 13A 13B JDM Brand New. Never Used. Never Installed Made from T-6061 High Quality Billet Aluminum Hard Anodized Process for a Longer Lasting Finish Oil Cap Includes High Quality Rubber O-Ring Gasket to Prevent Oil Leakage. Fits Mazda ROTARY Engines ONLY