V-40 pushrods feature self-lubricating tool steel tips hardened to 60Rc. The 5/16" diameter ball end is formed with a 210-degree radius at the end of a 1-5/8" taper to provide proper operating clearance around the rockers as well as the lifters and lifter bores. Engineered to overcome degradation troubles on the upper ball of high-revving high-powered engines, these V-40 cup pushrods
are now available in 5/16" with a .281 radius cup. Prepared in a satin finish over a precision center-less ground surface and laser-etched to the customer’s request. V-40 pushrods are available in any length — usually 6.000" to 13.000"

see more