Sale 20% Off Heavy Duty Head Stud Kit – 220K+ PSI Tensile Strength Upgrade – 08-10 Ford 6.4L Powerstoke Diesel If you’re pushing your 6.4L Powerstroke beyond stock—or simply want to eliminate one of its biggest failure points—the SWAG Performance Heavy Duty Head Stud Kit is the upgrade your engine demands... MSRP: Was: $299.95 Now: $239.95 Add to Cart The item has been added