MaxSpool Engineering Dual valve spring , for the Cummins 24 valve from 1998 ½ to 2002 and Common Rail Cummins 2003 to present including 6.7 liter engines . This kit included MaxSpool Engineering Titanium retainers .This spring kit allows higher lift camshaft profiles . These springs are also necessary with higher boost . Specifications 110 lbs @ 1.375 installed height coil bind at ..790 . These retainers allow the spring to be set at 1.400 installed height giving 95 lbs seat pressure for street use .

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