This is an optional set of RPM 4S Kraton and Outcast Front Suspension Arms, intended for use with ARRMA Kraton and Outcast kits and designed for strength and durability with features to better enhance performance. These A-arms deliver excellent slop elimination by reducing 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. The addition of a second shock mount hole further out on the arm provides a lower profile suspension set-up. This shock position allows the suspension to lay down a little further, dropping the ride height for a lower center of gravity and better cornering stability. All RPM A-arms are molded from their nearly indestructible blend of engineering grade nylons for performance you can rely on when conditions are at their worst. These arms are almost 25% thicker and able to take much more damage than stock.