follower assembly 48 attached to the lower end of a pushrod 46 according to an aspect of the present invention the exemplary lifter assembly 48 may include a main lifter body 120 threaded lifter cap 124 coil spring 122 lower ball seat 128 a second ball end 115 on the other distal end of the pushrod 46 and upper ball receiving sleeve 126 the main lifter body 120 is cylindrically shaped so that it will fit in stock lifter seats provided within conventional engine blocks on the distal end of the main lifter body 120 is a notched portion 123 for receiving a cam lobe 52 see fig1 and 2 and a concave end 125 which provides clearance for the main camshaft 50 preferably a following groove pin 54 to be received in the follower groove 53 of the cam lobe 52 is installed into the notched portion 123 however it is contemplated that any equivalent machine element which accomplishes the same tracking function may also be incorporated into the notched portion of the main lifter body 120 the main lifter body 120 further includes an internal cavity 134 disposed therein which is adapted to receive several parts including the threaded lifter cap 124 coil spring 122 lower ball seat 128 the second ball end 115 on the other distal end of the pushrod 46 and upper ball receiving sleeve 126 as most conventional pushrods have incorporated therein the exemplary pushrods 46 are also hollow for oiling system purposes therefore oil is allowed to flow inside the hydraulic lifter follower assembly 48 in operation oil is filled within the internal cavity 134 such that the lifter 48 acts as a dampener that maintains a constant yet adjustable tension on the connecting rocker 32 furthermore since hydraulic lifters.