24V Conical Pressure Tower Valve Spring Kit With Tool Steel Retainers. 4500RPM

100# valve seat pressure. Supports up to 2000HP. Important Note: Some 1998.5-2002 Cummins trucks may require valve spring pocket adjustments to fit conical springs properly. Manton provides a pocket cutter for this purpose if your spring pocket size is smaller than 1.190". Only the 24v VP44 heads occasionally has smaller pockets. In that case, we recommend or can swap the customer to DAP-24V. The springs are optimized for up to 75 PSI boost,104VS 104# Valve Springs, rated for 4000RPM and High boost for 1998.5-2018 Cummins 5.9L and 6.7L. 103 lbs @ 1.340″ installed height 176 lbs @ 0.920″ lift Maximum valve lift accommodates 0.420″ at 1.340″ installed height.