Kryptonite

The Duramax 2550 and 3500s aren't exactly known for their stellar handling, especially after a decent amount of miles are put on them. The good news is that Kryptonite Suspension has everything your tough Duramax needs to get the on-road handling and off-road performance it needs. Kryptonite carries a bunch of different parts and components, include torsion keys, control arms, tie rods, end links, leveling springs, and other hardware that will improve your Duramax's suspension performance and durability. Kryptonite even has a bunch of complete suspension systems and leveling kits available that come with performance shocks so that your Duramax build gets a complete overhaul.