Zen Racing RXGT12 rear droop spring kit
Coming from Zen Racing and made for the RXGT12 pan car is the rear droop spring kit. The part replaces part number ZENC152 and the use of the fixed droop set screw. By replacing the droop screw with a spring the car is better balanced over bumps and offers an even better transition of weight entering a corner.
Source: Zen Racing [zen-racing.co.uk]