SMALL-BLOCK ENGINE 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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