This engine was upgraded with an optimized valve timing and new cooling system with shut - off valve. (topspeed.com)
Further engineering specifics of this BMW M Power engine are found in the pistons, camshafts and an almost entirely new cooling system: to provide cooling appropriate to the dramatically high power output, the system originally developed for the X6 xDrive50i, the 750i / Li models and the 550i GT has been modified and expanded. (bmwusanews.com)
A spread of extras help it tick the safety and road - worthiness boxes while a comprehensive remap and new cooling systems make the 7.0 - litre normally - aspirated V12 good on the emissions and practicality front. (carthrottle.com)