The Power Behind the Forces... Perkins manufacture a range of diesel engines for military applications which spans the powerband from 7-2600 bhp (5-1938 kW) in both V and in-line configuration. Perkins engines are also integrated with the X-300 transmission which is also manufactured to create the highly successful PowerpaK range. Perkins CV12 engines power the British Army's Challenger main battle tanks and armoured repair and recovery Vehicles, while the V8 PowerpaK is used in the Warrior infantry fighting vehicle. Perkins in-line engines power the combat engineer tractor, and the BR90 bridging system for example. Perkins Engines has also been chosen as the sole supplier for the US Army's Crusader field artillery system and the Theater high altitude air defence system advanced tactical power unit. In addition to the provision of engines and PowerpaKs for new vehicles, Perkins Engines is active in the field of equipment modernisation, offering engine or PowerpaK retrofit packages. Moreover, Perkins Engines carries out full overhaul and repair of diesel engines and transmissions and can support major military programmes world-wide with full integrated logistics support packages.