Genuine Cummins 3931623 tappet/lifter set for the 4BT
3931623 Tappet
The Hammer Down Diesel Store
Genuine Cummins 3931623 tappet/lifter set of eight (8) for the 4BT engines
Cummins Diesel Engine Valve Tappet / Lifter / Follower , ’89-’98 3.9L 4BT
Genuine Cummins tappets for the 4BT engines. When replacing the camshaft on the 4BT Cummins engine make sure to replace the tappets. Using old tappets on a new camshaft could cause uneven ware on the camshaft itself. These are sold individually.