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Earl's Racing Products Head Bolt Set - 12-Point Head - Big Block Chevy

Fits Big Block Chevy 396/402/427/454 w/ OEM Style Cylinder Heads


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$99.77   Your Price
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Earl's Racing Products head bolts are made from premium quality 170,000 psi chromemoly alloy steel (about 15% stronger than Grade 8). These bolts have a reduced wrench size (choose from 12-point or hex head) for extra socket clearance (provides extra clearance to rocker arms when re-torqueing heads). The wide flanged head provided more support for the extra thick chromemoly washers. These head bolts are reusable and are the ideal way to upgrade the performance of your engine, and eliminate the hassle and cost of replacing OEM style torque-to-yield style bolts each time the cylinder heads are removed. Black oxide finish & sold in complete engine sets. Made in the USA.


  • Material - Chromemoly Alloy Steel
  • Yield Strength - 170,000 PSI
  • Finish - Black Oxide
  • Reduced Wrenching Size – Provides Extra Socket Clearance
  • Choose Form 12-Point or Hex Head Styles
  • Includes Premium Head Bolts, Washers & Anti-Seize Lubricant
  • Sold In Complete Engine Sets
  • Reusable Head Bolts & Washers (Not Torque-To-Yield)
  • Made in the USA


Emission Code5
EngineChevrolet Big Block Mark IV
FinishBlack Oxide
Head Style12-Point
Product TypeCylinder Head Bolts
PSI Rating170,000
Thread Size7/16"-14
Washer IncludedYes
Wrench Size1/2"
Part NumberTBS-004ERL



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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