The Powerstroke Products Loaded 6.4L Cylinder Head With HD Springs is a direct replacement for your 2008-2010 Ford 6.4L Powerstroke PP-6.4HeadLHDVS. Now you can eliminate the hassle of having to change valve springs yourself. This loaded cylinder head starts off as a brand new casting and is assembled with new valve seals, valves, and valve springs. The heavy-duty valve springs are designed to work with modified trucks and eliminate valve float caused by elevated power levels. Sold individually.