If you're making (or trying to make) big power out of your 7.3L, you need to upgrade your valve springs. The factory springs will lift prematurely when high amounts of boost are applied. Upgrade with this Irate Competition Valve Spring Kit to ensure you're making the power you're after.
IDP competition valve spring kits give 150psi seat pressure for engines running very high boost and need to maintain proper valve control. Irate Diesel recommend these for anyone using over 600RWHP or 300/200cc hybrids and up.
Irate Diesel Performance Competition Valve Spring Kit Features:
•Kit includes springs, retainers and locks
•Seat Pressure: 160 lb ft @ 1.42 in (150psi)
