ACDelco Flywheel - 55570175 Part #: 55570175 Line: ACD ACDelco Flywheel 2 Year LIMITED WARRANTY Material: Iron Number Of Teeth: 135 Bolt Circle Diameter (mm): 130mm Bolt Circle Diameter (in): 5.120 Inch Flywheel Type: Flat Number Of Crankshaft Mounting Flange Bolt Holes: 8 Ring Gear Outside Diameter (in): 11.300 Inch Ring Gear Outside Diameter (mm): 287mm Show More Show Less