Product Description
Shop with Blessed Performance for the River City Diesel Heavy Duty 120# Valve Spring Set for your 2003-2010 6.0L/6.4L Powerstroke diesel. 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.
