A true Oldsmobile mechanical tappet. This tappet is .842″ diameter and is .090″ longer in the pushrod socket than Chevrolet lifters most manufacturers supply. These tappets allow you to use very high lift camshaft without exposing oil gallery holes in lifter bores which causes drastic loss of oil pressure. Set of 16.
This .842″ Oldsmobile hydraulic roller tappet incorporates crossbar design and fits all Oldsmobile engines with a .842″ lifter bore. This roller tappet is .500″ longer than a stock tappet and requires a shorter, specially made pushrod. Set of 16.