6.0 / 6.4 Powerstroke – Straight Valve Springs

Manton Powerstroke 6.0/6.4L High Rev/High Boost Valve Springs   Designed by Manton for reliability across all performance levels, from Mild to Wild. Sold in a pack of 32 springs. Note: Ford now supplies a single 9.795-inch pushrod length for both 6.0 and 6.4 engines. Valve spring specifications: 100 lbs @ 1.800″ installed height 252 lbs @ 1.250″ (.550″ valve lift) Accommodates max valve lift of .625″ at 1.800″ Fits: 2003-2010 6.0 and 6.4L Powerstroke engines Please Note: Manton offers heat-treated spring shims in various thicknesses to adjust seat pressure for max boost adjustments.