Redcat Racing 02029 Differential Ring Gear ~ Works with these models ONLY: LIGHTNING EP DRIFT,LIGHTNING EPX PRO,LIGHTNING STR,SHOCKWAVE,TORNADO BB,TORNADO S30,TSUNAMI (nitro),TSUNAMI EPX,VOLCANO EPX/EPX PRO,VOLCANO MX,VOLCANO S30,VOLCANO STX,VOLCANO SV,VORTEX SS