4PCS Speed Run Shock Springs for Arrma Limitless Infraction Felony RC Car Improved Driving Stability Upgrade Parts Features： 1、Fitment: Speed run springs are replacement for Arrma Limitless Infraction Felony, please confirm whether your model is applicable before buying. 2、Improved Stability: Stiffer springs and more posture ensure that the vehicle is not easy to roll over at high speeds, improving driving stability and providing a smoother driving experience. 3、Quick Installation: The shock springs feature a user friendly design that allows for straightforward installation, enabling drivers to quickly experience the accuracy of the operation. 4、Durability in Design: Constructed from high hardness metal material, these speed run springs are built for longevity, are resistant against wear and tear over time. 5、Comprehensive Upgrade: Each purchase includes 4 pieces speed run springs, providing a full upgrade package that ensures all corners of your vehicle. Specification： Item Type: Speed?Run?Springs Material: Metal Fitment: Replacement for Arrma Limitless Replacement for Arrma Infraction Replacement for Arrma Felony Package List： 4 x?Speed?Run?Springs