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CLUTCH CRANK SHAFT PILOT BEARING ROLLER HIGH PERFORMANCE GM # 90721 THIS IS THE PERFORM ROLLER BEARING THAT MOUNTS IN THE BACK OF THE CRANK SHAFT FOR MANUAL TRANSMISSIONS. MOST STOCK PILOT BEARINGS ARE BRASS; THIS IS THE PERFORMANCE ROLLER BEARING. FITS 1958-1985 ALL GM CARS EXCEPT FOR AN OLDSMOBILE ENGINE THAT HAVE AN AUTOMATIC CRANK SHAFT. IF YOU HAVE THIS AUTO CRACK SHAFT YOU WILL NEED TO ORDER # MT3654T THAT IS THE CONVERSION BEARING - EA
