If suburbanites need four-wheel-drive vehicles to turbocharge their urban drive, that's OK with BorgWarner. The company is a leading maker of engine and drivetrain products for the world's major automotive manufacturers. Products include turbochargers, air pumps, timing chain systems, four-wheel-drive and all-wheel-drive transfer cases (primarily for light trucks and SUVs), and transmission components. Its largest customers include Volkswagen, Ford, and Daimler. The company nets around 75% of sales from outside the US; more than half come from its European operations.