One piece billet valve cover fits 1989 to 1993 1st gen 5.9L Cummins 12 valve engines. Notched to fit over stock injection lines.3.25″ total height will clear most all aftermarket studs. Taller than stock covers. Also acts as a girdle for the rocker pedestals to help stabilize them when using high spring pressures and rpm. Engraved with Keating Machine logo on top. Can be ordered custom engraved or without engraving, call for details. Sealed with individual o-rings to head. 2nd gen 1994 to 1998.5 also available.