Wedge-Locking Header BoltsBig Block Chevy, Big Block Mopar 413, Small Block Ford3/8" Diameter x 1"
LongBlack Oxide16/pkg Fits: GM BB 396-502 except 348 & 409, Ford 5.0L, SBF 289-302-351W, and
Mopar 413 with 3/8" boltsNote: 3/4" length bolts most often used for cast iron heads. 1" length bolts recommended for aluminum heads.