Tappet - Standard - XL691548Caracteristicas: Micro finish bore allows a running fit of . 0002" Big Axle rollers are designed around three working parts The outer wheel roller has a 27% greater wall size less harmonic distortion for better tracking of cam lobe Pin bearings are decreased in size by 12%, which increases rpm for more precise tracking Axle size is increased 36% and doubles as the inner race, so the pin bearing and complete roller assembly now rotate around the axle