Mazda Rotary Powered by 13B-REW Twin Turbo 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