For M-6049-Z304 series heads on a 351W block - not for Boss 302/351 blocks (use M-6014-BOSS)
Cylinder head stud kit (1/2 in studs, 12-point nuts and hardened washers) for Ford Performance Z304 heads on 351 Windsor small block Ford engines.
Ford Performance Cylinder Head Stud Kit - M-6014-Z304