Engine Bearing Type: SHY1 SHY4 SHY6 SHY8 SKYACTIV/ SKY ACTIV. Engine Code: SHY4. Inlet Camshaft. Exhaust Camshaft. Type: engine rebuild kit. Timing Chain Kit. Make: MAZDA. NITRATE CRANKSHAFT (4WEB) WITH ENGINE REBUILD KIT FOR BMW 3.0 DIESEL N57D30 NEW.