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Mr. Gasket

Mr. Gasket Header Bolts - M8-1.25 x 25mm Socket Head - Black Oxide

Fits 1991-Up Ford 4.6/5.4L & Chrysler 5.7,6.1,6.4L Gen III Hemi

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Black oxide finished carbon steel header bolts have a compact hex head and the flange is ideal for use where space is minimal?.your typical header flange. Includes seventeen (17) M8 - 1.25 x 25mm header bolts.


  • M8 1.25 x 25 mm Long
  • Allen Head
  • Fits: GM LS Series Engines 1997-'15
  • Fits: Gen 3 Hemi 5.7L/6.1L, 6.4L 2003 & Up
  • Fits: Ford 4.6L/5.4L Modular 1991 & Up

About Mr. Gasket

Using his own '57 Chevy as a rolling testbed, drag racer Joe Hrudka launched the most famous gasket company in the world more than half a century ago. Mr. Gasket is the go-to gasket source for racers with gaskets and fasteners that seal perfectly every time.

Brand Mr. Gasket
Emission Code5
FinishBlack Oxide
Product TypeHeader Bolts
SizeM8-1.25 x 25mm
WarrantyLimited 90 Day Warranty
Part Number978G

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.

Limited 90 Day Warranty: See Details

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

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