New Screamin’ Eagle® Tappets (P/N 18572-13, $249.95) from Harley-Davidson® Genuine Motor Accessories® are designed to deliver superior tappet life in high-performance Harley-Davidson Twin Cam and Sportster engine applications. Large, high-capacity needles in the roller bearing assembly improve reliability when operating with high-lift cams, high-pressure valve springs, and in high-RPM applications.
The needle bearings are 25 percent larger to increase the dynamic load rating by approximately 20 percent when compared to the Original Equipment Twin Cam tappets. Sold in a set of four, these Screamin’ Eagle tappets may be used in 1999-later Twin Cam engines, and in 2000-later Sportster Evolution engines. Harley-Davidson.