SMALL-BLOCK FLYWHEELS

14085720

1955–1985 

  • Outside Diameter: 12.750"
  • Crank Flange Bolt Pattern: 3.580"
  • Clutch Diameter: 10.400"
  • Starter Ring Gear Teeth: 153
  • For two-piece crank seal
  • Lightweight nodular iron
  • Weighs approximately 15 pounds

3991469

1955–1985 

  • Outside Diameter: 14"
  • Crank Flange Bolt Pattern: 3.580"
  • Clutch Diameter: 10.400"; 11.000"
  • Starter Ring Gear Teeth: 168
  • For two-piece crank seal

14088646

1986–up 

  • Outside Diameter: 12.750"
  • Crank Flange Bolt Pattern: 3.000"
  • Clutch Diameter: 10.000"
  • Starter Ring Gear Teeth: 153
  • For one-piece crank seal
  • Lightweight nodular iron
  • Weighs approximately 17 pounds

14088650

1986–up 

  • Outside Diameter: 12.750"
  • Crank Flange Bolt Pattern: 3.000"
  • Clutch Diameter: 10.400"
  • Starter Ring Gear Teeth: 153
  • Standard-weight flywheel for one-piece crank seal

14088648

1986–up 

  • Outside Diameter: 14"
  • Crank Flange Bolt Pattern: 3.000"
  • Clutch Diameter: 11.000"; 11.850"
  • Starter Ring Gear Teeth: 168
  • For one-piece crank seal

SMALL-BLOCK FLEXPLATES

471598

1955–1985 

  • Outside Diameter: 14"
  • Crank Flange Bolt Pattern: 3.580"
  • Clutch Diameter: 10.750"; 11.500"
  • Starter Ring Gear Teeth: 168
  • For internally balanced engine with two-piece crank seal

471529

1955–1985

  • Outside Diameter: 12.750"
  • Crank Flange Bolt Pattern: 3.580"
  • Clutch Diameter: 9.750"; 10.750"
  • Starter Ring Gear Teeth: 153
  • For internally balanced engine with two-piece crank seal
  • Will not work with new SuperMatic torque converters

14088765

1986–up 

  • Outside Diameter: 12.750"
  • Crank Flange Bolt Pattern: 3.000"
  • Clutch Diameter: 10.750"
  • Starter Ring Gear Teeth: 153
  • For externally balanced one-piece crank seal
  • Will not work with new SuperMatic torque converters

12554824

1986–up 

  • Outside Diameter: 14"
  • Crank Flange Bolt Pattern: 3.000"
  • Clutch Diameter: 11.500"
  • Starter Ring Gear Teeth: 168
  • Heavy-duty flexplate with increased thickness for one-piece crank seal
  • Externally balanced

14088761

1986–up 

  • Outside Diameter: 14"
  • Crank Flange Bolt Pattern: 3.000"
  • Clutch Diameter: 10.750"; 11.500"
  • Starter Ring Gear Teeth: 168
  • For one-piece crank seal
  • Externally balanced

BOLTS

12337973

Flywheel Bolt

  • Fits all Chevy Small-Block V-8, Big-Block V-8, and 90° V-6 engines
  • Sold individually; 6 required per engine

3727207

Flywheel Bolt 

  • Fits all Chevy Small-Block V-8, Big-Block V-8, and 90° V-6 engines
  • Sold individually; 6 required per engine

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Visit www.chevroletperformance.com/emissions for more details.