Engine maker Cummins Inc. has extended its exclusive supply agreement with DaimlerChrysler for diesel engines used in the Dodge Ram heavy-duty pickup truck. Although specific terms of the agreement were not disclosed, the engine system agreement includes consideration of Cummins as a supplier for the diesel engine aftertreatment system. The agreement additionally paves the way for collaboration on diesel engine technology beyond the length of the contract, Cummins said. The deal covers the 5.9-liter turbodiesel for use in the Dodge Ram 2500 and 3500 Series pickup trucks. The diesel engine exhaust system components would be provided by Cummins’ subsidiary Fleetguard.