Engines were typically delivered from BMW complete in their cowling, ready to be bolted to the front of the aircraft or nacelle, since 1942 as "Motoranlage (M)" and 1944/1945 as "Triebwerksanlage (T)". The Motoranlage was the original form of the interchangeable "Kraftei", or "power-egg", unitized powerplant installation concept used in many German wartime aircraft. It was most often used with twin and multi-engined designs, with some need for external add-ons. The more comprehensive Triebwerksanlage format for unitization consolidated more of the engine's required accessory systems beyond what the earlier Motoranlage concept could, plus some external mountings, such as an integrally complete exhaust system (including a turbocharger, if fitted as part of the design), as a completely interchangeable unit. Both M and T formats were also used with various inline engines, like the Daimler-Benz DB 603 used for both the inline-engined versions of the Do 217 and the enormous BV 238 flying boat, and the Junkers Jumo 213 powerplants used for later marks of the Ju 88 multirole aircraft.