See: Exotek

Exotek have introduced an aluminium chassis for the HB Racing D216. The aluminium chassis provides more consistent handling and lowered CG for todays highly groomed indoor tracks. Machined from 7075 aluminum, the chassis features machined pockets throughout and chamfered edge on the bottom to improve ground clearance. The top is also machined to a have 2.5mm thick main section to reduce weight up to 145gr and the 4mm thick side rails keep this area stiff. It works with the stock side rails or the Exotek D216 carbon side rails.