1998-2003 Ram HD Main Stud Kit - 5.9L Cummins 24V 1998.5-2003 (218035200)Description Main cap bolts are a crucial component to maintain crankshaft alignment and ensure proper seals at the main bearing caps. Stock main cap bolts often yield in performance applications or even in stock conditions as stress cycles cumulate, which can lead to catastrophic engine failure. The PPE Main Stud Kit is designed to address this common failure point. The PPE Main Studs are constructed of premium chrome moly alloy with over 215,000 psi