The move will mean a boost of 45 horsepower and 30 lb-ft of torque for totals of 445 ponies and 480 lb-ft of twist, Car and Driver reports. The extra power is achieved through the addition of BMW's Valvetronic variable valve timing and lift system.
The change applies to all "50i"-badged 5-Series and 6-Series models, including the 550i sedan, 550i Gran Turismo and 650i coupe and convertible. Notably, the X5 and X6 will retain the old 400 horsepower, 450 lb-ft of torque mill, although that power is apparently still sufficient for the crossovers to motor over the competion.
