BMT Tamiya 931 K4 Racing
Model Number: 42001
The first of the kits that Tamiya collaborated with the Italian BMT (Blitz Model Tecnica) company on. The second was the 931 K2 kit 42002. Tamiya specified the OPS 2.5SL engine for these cars but apart from that they were almost standard BMT 931 kits. Tamiya listed all the BMT part numbers as Tamiya part numbers in the manual. Quite hard to find now with parts being long discontinued.