V-Thunder pushrods are designed for use in High Performance and Racing engines. They are made out of .049" wall, 4130 chrome-moly steel and precision machined to exacting tolerances. They provide the ultimate in reliability and performance. The adjuster portion of the push rod features 4140 high strength steel, with an induction hardened tip for severe service applications. Available for Evolution Big Twin from 1984-1999, in stock length. Sets of 4.