Hays 10-630 Billet Steel SFI Certified Flywheel

Compatible with 1986-1993 Chevrolet 4.3L V6 and 5.0/5.7L V8 with 1-piece rear main seal, 168-tooth, External Balance, 30 lb

PART# 10-630

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Hays Steel Flywheels are manufactured from certified billet material that will not break up under the stress of high RPM and severe punishment of racing. All Hays flywheels are certified S.F.I. spec 1.1. This 168 tooth flywheel fits the external balance 4.3/5.0/5.7 liter Chevy, 1986 to 1993 models with a one piece real main seal. The flywheel is drilled for 10.5 in Borg-Beck diaphragm, 11 in Borg-Beck diaphragm, long style and Mark XII clutches. It's weighs 30 lbs. Flywheel bolts included. Other applications available.


  • S.F.I. 1.1 Certified
  • Fits External Balance 4.3/5.0/5.7L Chevy
  • 168 Tooth Flywheel
  • Drilled 10.5 In And 11 In Clutches
  • Weighs 30 Lbs

Product Attributes

Emission Code5
Manufacturer Part Number10-630
Product TypeFlywheels
Part Number10-630



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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