Atomik RC Traxxas Nitro Rustler 1:10 Aluminum Alloy Front Lower Bulkhead Hop Up Upgrade, Red Replaces Traxxas Part 2530 Precision CNC Machined for Factory Spec Fitment. Hardened Billet 6061 Aluminum for Lightweight and Durable Performance. Easy Upgrade from the Original Part. Replaces Traxxas Part 2530. Atomik RC Offers a Full Line of Hop Ups for your Traxxas Nitro Rustler 1:10 Available in Red, Blue, Grey/Gunmetal.