This is ARC Rear Low Arm-Hard.
New Hard formula Rear low arm for R8.0/R8.0 2016/ R8.0E. The rear low hard arm is not only harder lighter(2.3g), and also stronger than standard arms.
Hard rear low arm width come with 0.3mm wider than the standard arm.
Please file and fix the width before assemble;before assemble H arm, please apply oil inside the screw hole to reduce stress of screw.
