BMW N54
The N54 is a direct injection twin-turbocharged straight-6 automobile engine from BMW. It debuted at the 2006 Geneva Motor Show and was launched in late 2006 as a high-performance option for the BMW 3-Series, first to be released along with the new 3-series E92 Coupé, to be followed closely by other existing 3-series models, then with other BMW series as well. The N54 has won five straight International Engine of the Year awards, and three straight Ward's 10 Best Engines awards.
The use of two small turbochargers plus direct fuel injection allows for a broader power band and less turbo lag than previous turbocharged gasoline engines.
Read more about BMW N54: Specifications, HPFP Problems