This flex is not visible to the naked eye and while your factory pushrods won't show signs of failure, it does not mean that you should not replace them for a stronger component.
The XD321 Pushrods are manufactured in the USA to XDP's stringent standards. Expertly handcrafted with only the highest quality materials, the 3/8 inch Street Performance Pushrods are made from a seamless 4130/4135 chromoly tubing that is cold drawn over a mandrel for increased rigidity and flex reduction.
The tips are manufactured from a core hardened and triple tempered 86L20 bar stock for maximum impact and wear resistance. This combination of manufacturing processes and materials results in a stronger pushrod giving you a quality component that helps to maximize valvetrain performance. Sold as a set.