HPI have released a host of upgrades for the Blitz short course truck including this titanium top shaft for the transmission. This part replaces the stock steel shaft with a shaft precision machined from strong and lightweight aerospace titanium for less rotating mass and quicker throttle response. There is also new is a titanium gear shaft for the transmission with the same benefits as the top shaft. Also new is the lightweight aluminum slipper carrier set that has been precision milled from aluminium for decreased rotating mass and quicker throttle response, and finished with HPI logos on dark brown anodized aluminum to match the latest Blitz option parts. Finally there are new tire holders to help keep your tire sets organized. Each package contains 2 sticks and 2 nuts, enough to organize 2 sets/8 tires.