LST drivers considering competition or simply looking to up their truck&#8217:s top speed will want one of these. The resultant reduction in rotating mass within the transmission after installing the conversion is almost like adding cubes to the engine or nitro to the fuel. Each kit includes the necessary gears and shafts, all of which are machined from heat-treated steel. Some get an additional titanium nitride coating. All parts within the kit are sold separately as well.