SAVOX HV DIGITAL BRUSHLESS SERVO 25KG/[email protected] - PLUSRPM A arms for 4S BLX versions of the ARRMA Kraton & Outcast are designed primary for strength and durability but weve added a few extra features in as well. First is slop elimination. Our A arms reduce the amount of movement of the A arm at the hinge pins, providing for better steering response and more consistent camber, caster and toe angle settings. Our next improvement is the addition of a second shock mount hole further out on the arm, providing