Atomik RC Alloy Front Rocker Arm Set, Blue fits the Traxxas 1/16 Slash 4x4 and Other Traxxas Models - Replaces Traxxas Part 7158 Precision CNC Machined for Factory Spec Fitment. Hardened Billet 6061 Aluminum for Lightweight and Durable Performance. Atomik RC Offers a Full Line of Hop Ups for your Traxxas Model, Available in Blue, Red, and Gunmetal Also Fits: Traxxas 1/16 E-Revo, 1/16 Boss 302 Ford Mustang VXL, 1/16 Rally VXL, 1/16 Ford Fiesta Easy Upgrade from Original Part. Replaces Traxxas Part 7158.