When installing headers you will need header bolts, factory exhaust manifold bolts won't work. These Mr. Gasket Header Bolts are Grade 5 for strength, black oxide coated, and have a compact hex head that is ideal for use where space is minimal - your typical header flanges.
Sold as a set of 12.
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