BMW 5 SERIES E39 ELECTRONIC TWIN COOLING FAN CONVERSION SYSTEM - 540 530 528 525
KEEP ENGINE RUNNING COOLER FOR MORE HP, YOU DECIDE WHAT TEMP YOU WANT YOUR ENGINE TO RUN AT. WITH THIS SYSTEM YOU WILL NOTICE NO MORE FANS NOISE UNDER THE HOOD. NOTICABLE BETTER MPG, AND OF COURSE THE ADDED HORSEPOWER THAT YOU STRIVE FOR.