6.0L / 6.4L Ford Power Stroke Heavy Duty 120# Valve Spring Set

For over a decade these springs have been proven to be the go-to in Power Stroke high-rev, high boost applications.

We designed these springs to offer 40 more lbs of seat pressure while keeping the open pressure nearly stock. This design allows you to run OEM style hydraulic lifters without causing failure or overloading, while still being able to handle 100+ PSI of back pressure.