The LoadHandler Power Products L545 Gear Reduction Starters are designed to fit 3.9L to 5.9L Cummins diesel engines. These starters offer up to 2.5 kW output in 12V systems. This starter is a drop-in, bolt-on replacement with the same appearance, fit and function as the OE design. The starter features a heat-treated shaft for improved durability and service life, and the unit includes a one-year, parts-only warranty.