This BMW 2.3-liter S14B inline-four and Getrag five-speed manual gearbox was removed from an E30 M3 and underwent an excellent rebuilt. The engine features a cast-iron block, an aluminum cylinder head, dual overhead camshafts, and a black-finished intake plenum with “BMW M Power” lettering. A used clutch is included with the gearbox, and the package also includes a Bosch Motronic control module, wiring harnesses, and a variety of ancillary equipment and spare components.