XDP X220 Series Head Stud Kit XD3013HSThe XDP X220 Series Head Stud Kit XD3013HS provides your 1994 2003 Ford 7. 3L Powerstroke with the increased clamping power you need. Upgrading the factory head bolts is a must when adding horsepower and torque to your Super Duty. The OEM bolts typically can't handle the additional pressure from high performance applications which can lead to the cylinder heads lifting. Upgrading to studs helps keep your cylinder heads locked down and avoid head