Push rod (aluminum) (assembled with rod ends) (2) (use with long travel or #5357 progressive-1 rockers) Revo & Summit’s linkage based suspension requires different push rod assemblies depending upon which rockers are used. Strong, 7075-T6 aluminum versions of each are available to decrease the total weight of the truck by 31 grams. Rod ends are already installed making it simple to just bolt them on the truck. When using progressive-2 rockers, spacers (part # 5133) are required for use with the 5318 or 5318X push rods. These spacers are included with the progressive-2 rockers. Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings.