This is an optional Agama Racing R4 Chassis, and is intended for use with the Agama A8 EVO. This chassis is 4mm longer than the stock chassis, providing improved handling on bumpy tracks, as well as more stability and corner speed on large tracks with sweeping turns. When used with the redesigned lower engine plate (AGM7215), you will have more rear flex and a stiffer center. Includes long rear CVD bone (AGM8417).