ACDelco Flywheel - 24279978 Part #: 24279978 Line: ACD ACDelco Flywheel 2 Year LIMITED WARRANTY Material: Iron Number Of Teeth: 132 Bolt Circle Diameter (mm): 10mm Bolt Circle Diameter (in): 0.390 Inch Flywheel Type: Dual Mass Number Of Crankshaft Mounting Flange Bolt Holes: 8 Ring Gear Outside Diameter (in): 11.890 Inch Ring Gear Outside Diameter (mm): 302mm Show More Show Less