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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.
- ManufacturerIrate Diesel Performance
- 160 Lb. Seat Pressure at 1.80 Pressure
- 420 Lb. Open Pressure at 400 Lb. Spring Rate
- Ford Valve Seals
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