The BD Diesel 60lbs Valve Spring Kit (1030060) is a high-performance upgrade designed specifically for the 1988–1998 Cummins 12-Valve 5.9L diesel engine. Engineered to handle increased boost and RPM levels, this kit includes heavy-duty valve springs rated at 60 pounds of seat pressure, providing improved valve control and reducing the risk of valve float under high performance or towing conditions. Ideal for modified engines with upgraded turbochargers or fueling systems, the BD Diesel valve springs ensure reliable valve operation and enhanced engine durability. This kit is a popular choice among diesel enthusiasts looking to maximize the performance and longevity of their 12-valve Cummins engine.