Type 4 Main Bearing Standard 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 standard line bore case. With new or reground crankshafts.
021198481 standard crank
021198483 -.010"/-025mm crankshaft
021198485 -.020"/-.050mm crankshaft