Aluminum Push Rods, 13-1600cc engines. The use of Aluminum Push Rods will reduce valve train weight and help your engine produce more horsepower. Aluminum Push Rods expand at the same rate as your engine and result in more constant valve settings and a quieter running valve train. Aluminum Push Rods are manufactured from 2024 T3 alloy and are fitted with hardened steel ends. The use of Aluminum push Rods will extend the life of your lifters, camshaft, valves, and rocker shafts due to the reduction of reciprocating weight. One size is available to fit 13, 15, and 1600cc basic engines.