Header Bolts

3/8-16 x 3/4" - 12 per Package, Grade-5, Hex Head, 7/16" Wrench Size.

PART# 915

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When installing headers, your factory exhaust bolts will not work to attach the headers back to the motor. Our header bolt are designed for quick and easy installation. These are high quality bolts that are proven performers. These bolts look good on all applications and they have a black oxide coating that resists rust. Fits: AMC 290-401 Chevy Small Block 262-400 Chrysler Big Block 383-440 (Does not Fit 426 Hemi) Pontiac 326-455 Oldsmobile 330-455


  • Has A Black Oxide Coating
  • Made Of High Quality Grade 8 Steel
  • Has A Hex Head With Flange
  • Designed For Minimal Clearance Applications
  • 12 per Package
  • Grade-5
  • Hex Head w/ 7/16" Wrench Size


BrandMr. Gasket
Emission Code1
FinishBlack Oxide
Head StyleHex
Product TypeHeader Bolts
WarrantyLimited 1 Year Warranty
Wrench Size7/16"
Part Number915


This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
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      *Free Shipping & Handling only offered to the contiguous US on orders over $100.

      Some parts are not legal for use in California or other states with similar regulations.