HEADER BOLTS        16 BOLTS,WASHERS AND SPLIT WASHERS 

STAINLESS STEEL   Good quality please see coments in my feedback

FOR FORD AND CHEVY  SB AND BB V8 ENGINES                      sb 260 283 289 302 350 351 400 etc       also  mopar with 3/8 unc thread

 CAP HEAD         as in picture   

Imperial allen key fitting

1"  1/4 long with small enough head for clearance on tube headers  

Good quality