Texas Speed 5/16" .080 Wall Chromoly Pushrods, Set of 16Texas Speed & Performance Chromoly Hardened Pushrods In Your Choice Of Lengths!Hardened pushrods are a must for any valvetrain upgrade on your LS based engine. These TSP chromoly pushrods feature .080" wall thickness & are designed for stability under high rpm use. These one-piece pushrods are heat-treated and feature oil holes that are drilled and chamfered to prevent stress fractures and cracks. These 5/16" pushrods are available in many lengths. Standard LS1/LS2/LS6/L92/LS3/L99 length is 7.400" If your building a custom valvetrain setup you might consider purchasing the Texas Speed adjustable pushrod measuring tool (25-PRChecker). At only about $25 it's a perfect tool for making sure you get exactly the right pushrod length for your application. A large number of variables are involved in determining the correct length pushrod for your application.Pushrod length is affected by any of the following: Block deck height Head deck height Head stud boss height Rocker arm brand/design Cam base circle size Lifter design/brand/pushrod seat height Valve stem length Don't assume anything when determining the right pushrod for your new engine. A pushrod that fits one engine may not necessarily work in another. Any number of items can be different on your engine, requiring you to use a different pushrod length.