This is ARC R8.3E Car Kit.
ARC R8.3 E 1/8th On-Road Electric Competition Car Kit:
The R8.3E comes with a 5mm carbon fiber chassis for reduced weight and excellent flex characteristics that delivers superiors mechanical grip.
The R8.3E transmission retains a 3-belt drive system through the center of the chassis. The belts and pulleys are the same specifications as the R8.3.
Integrated Upper Deck
The integrated 3-piece upper deck connects the front bulkhead to the rear along with a fan mount for cooling the motor. The upper deck design complements the main chassis to provide optimized flex, but at the same time, reduces the likelihood of the belt flipping over the pulley.
New Internal Ratio
The new motor mount and a new internal ratio of 2.4, allow a wider gear ratio turning window on the R8.3E from 4.75 to 5.85.
Centralized battery position
Batteries sits either side of the drive system close to the centerline of the chassis to improve weight distribution and lower the rolling moment.
New Longer Rear Shocks
The 8.3E features new longer rear chocks that are 3mm longer than the previous model. This allows the shocks to be moved closer to the centerline for improved handling characteristics. Further improvements have been made to improve smoothness and sealing to deliver a more consistent rebound.