How to Install Mr. Gasket HEADLOCK Locking Header BoltsYouTube Button

HeadLock Locking Header Bolts

3/8"-16 x 3/4" - 16 per Package Fits: Chevy Big Block 396-454, Ford 289-351W, 426 Hemi, Ford 429-460, 1965-98.

PART# 2231G

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Completely takes hassle out of header installation Keeps you from burning your hands burned getting bolts started Gold-colored thread-lock patch prevents bolts from backing out or vibrating loose 24 equally spaced serrations lock onto the header or exhaust manifold flange No lock washers necessary Eliminates power-robbing exhaust leaks Made of stainless steel, with a bright polish finish Withstands tensile strengths of 150,000 PSI Comes with a ball-head/hex-key socket-installation tool that makes it easy to get them started


  • 16 per Package
  • Grade 8 Bolts


BrandMr. Gasket
Emission CodeN/A
GradeGrade 8
MaterialStainless Steel
Product TypeHeadLock Locking Header Bolts
Part Number2231G


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