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Michigan Motorsports Woodruff Crankshaft Key 3/16' x 3/4' Steel Alloy

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  • Michigan Motorsports Woodruff Crankshaft Key
  • 3/16" x 3/4". Made of Steel Alloy
  • This 3/16" wide, 3/4" long woodruff key is a common size used for the 2nd key slot on aftermarket LS crankshafts for the balancer hub keyway, and is also a common size used on older Small Block Chevy crankshafts.
  • NOT for use on OEM LS crankshafts.
  • See GM # 12561513 for the factory LS crank key used to position the oil pump drive and timing sprocket.


Woodruff Crankshaft Key 3/16" x 3/4" Steel Alloy This 3/16" wide, 3/4" long woodruff key is a common size used for the 2nd key slot on aftermarket LS crankshafts for the balancer hub keyway, and is also a common size used on older Small Block Chevy crankshafts. NOT for use on OEM LS crankshafts. See GM # 12561513 for the factory LS crank key used to position the oil pump drive and timing sprocket.