ARC
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This is ARC Front Low Arm-Hard.
New Hard formula front low arm for R8.0/R8.0 2016/ R8.0E. Hard arm not only is harder, it is also lighter (2.5g), and stronger than standard arms. Hard front arm width come with 0.5mm 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.