Hamilton HD Valve Springs (1998.5-2011)

Stock 24v springs allow the intake valve to blow open at 50psi on the bench. This is a major problem and it is intensified as rpm increase. With high drive pressures your engine might even be experiencing reversion, when the exhaust valve blows open on the intake stroke contaminating the intake charge. Get Control of your valves with our springs and pushrods. Our 24 valve springs are designed to work with your factory retainers and locks, and have a beehive design to reduce mass on the end with most linear motion. They are made with the highest quality ovate wire to handle cams with higher lift. They coil bind .111 after the stock springs, and have been triple shot-peened and nitrided to reduce internal stresses, prolong life and prevent corrosion. The BEST springs on the market at an affordable price. For use with all 24v Cummins from 1998.5-2011 5.9L and 6.7L engines. Aftermarket retainers are needed on 24v engines that rev over 4,000rpm.