The new R842025 is 1.2mm higher than R832004.
This front upper arm holder can improve the corner speed and it fits on R8.3 and all R8.4 series cars.
ARC R100038 A10-25 Electric Touring Car Kit (Carbon Chassis)
Elceram Oxide 1/10 145A Brushless ESC with LCD Display
SRT BHMX2 i-BUS2 HV Ultra Low Profile Brushless Servo - 0.073s/18kg @7.4V
Fido 6500mAh 2S 7.4V 220C Super Low IR LCG Lipo Battery