This is EXO Design Yokomo Works 91 Conversion Kit For BBS Shocks Version. One Chassis two layouts choose from. All carbon parts are made with 100% carbon fiber plate. Reenforced front and rear shock towers (3.5mm). For Big Bore shocks. Extra mounting positions on shock towers are available for fine tunings. Two aluminum battery holder nut and a carbon battery plate. The space can be adjusted freely according to the battery size. Two aluminum servo stands. Aluminum Servo Saver (Hex). EXO Design Yokomo Works 91 Conversion Kit For BBS Shocks Version (1 set).