Type 4 Main Bearing .020 Line Bore Case
Original equipment supplier. Aluminum alloy face and steel backed to prevent to distortion at high rpms. Engineered for fatigue and temperature resistance for longevity. Developed to conform to the geometry of the rotating mass for consistent lubrication.
For type 2/4 and 914 1700-2000cc engines +.020"/+0.50mm line bore case. With new or standard journal crankshafts.
021198491A standard crank