Mr. Gasket 3409 - Mini Hex-Head Header Bolts

Designed for quick, easy installation of headers and heat-treated for extra strength. The special washer faced, smaller-than-standard hex head is ideal for tight spaces. These bolts are Grade 5 with a 7/16 hex head and a protective black finish, except where noted. 3/8"-16 x 3/4"with a mini 3/8 "hex head,(12/set). 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