Kyosho 1 43 S207 NBR Challenge Package Yellow Edition, Diecast Model RGR3100 Hot Racing's aluminum adjustable steering Hot Racing's aluminum adjustable steering bellcrank and servo saver for the Traxxas X Maxx vehicle The control program on the circuit board provides linear handling characteristics and can be further enhanced for even easier control by installing the optional gyro unit (MZW431 sold separately) the NBR Challenge Package featured even more special components including special dry carbon rear spoiler and black STI BBS forged wheels while the interior was equipped with Ultrasuede steering wheel the S207 is the first WRX model to feature an STI tuned engine and suspension and was also equipped with special interior and exterior parts