FORD 351C COBRA-JET BOSS 4V INTAKE MANIFOLD BOLT KIT. Fits OEM Intakes on 351 Cleveland 4V Heads (Cobra-Jet, 351 HO, Boss 351). Rusty, rounded-off bolts is a thing of the past! Rogue stainless steel allen socket head bolts will not round off like hex head bolts and are the clear choice when bolt clearance and accessibility is at a premium.