Empire Performance Engineering is proud to announce the release of the 6.0L & 6.4L Powerstroke Stage 1 Beehive Valve Spring Kit which is rated for 120 PSI seat. These valve springs out preform all the competition for Stage 1 Drop in replacement Valve Spring Kits. There is no extra cylinder head machining required to run these springs. Great for Stock to Mild Boost up to 70Psi.
- 110 - 120 PSI Seat
- No Extra Cylinder Head Machining Required
- Up To 70 PSI Boost
***Uses Stock Retainers, Locks, Keepers***
Note: The use of these springs can be used on a higher/aggressive lift camshaft but it is highly recommended to have a professional machine shop properly adjust installed height to accommodate upgraded camshaft.