radius to provide additional clearance to the Rocker arm adjuster at peak lift. The thicker .165"wall is stiffer and stronger than previous .125" wall offerings, thereby providing more accurate valve motion and durability. The pushrods are made in the U.S.A. from one-piece, heat-treated 4130 chromemoly Steel tubing, which makes them stronger than most pushrods on the market today.Full Set of (16) 8.550" PushrodsMiddle of Pushrod is larger in diameter than both ends Offers the benefits of a large, 7/16" Pushrod combined with the clearance of a 3/8"Both 5/16" ball ends have a 210˚