The GE BB40-9W is a narrow-gauge version of the popular GE C40-9W locomotive. All 141 examples of this locomotive are owned by the EFVM railroad in Brazil. They are equipped with four B-style trucks, two at each end replacing the conventional C-style trucks. This is necessary because EFVM tracks are 1,000 mm (3 ft 3 3⁄8 in) narrow gauge. The standard C44-9W traction motors cannot fit in the narrower trucks. To get the same total power, more of the smaller motors are needed. They are numbered 1113 to 1253.