One of the most important engines in racing history, the Carrera engine is a technical masterpiece. It helped Porsche win several racing awards in cars like the 550 Spyder and the 356. This kit helps you build a transparent working model of the flat-4 horizontally opposed engine that runs well and shows off the elements of the legendary motor. It's easy to assemble and the kit contains a 300-piece 1:3 scale model kit that includes a screwdriver and a 112-page collector's book with archive drawings and photographs that was written and produced by the Porsche Museum in Stuttgart. The motor runs on 3 AA batteries.