This Cometic oil filter housing gasket fits Nissan RB20 and RB26DETT engines at a .039-inch thickness and serves as a service replacement for the oil filter housing mating surface. Cometic notes that their gaskets and seals undergo in-house dynamometer and engine assembly testing to ensure durability. The gasket is intended for builders and technicians maintaining RB-series engines to restore a proper oil seal.
Cometic Nissan RB20/RB26DETT .039in F Oil Filter Housing Gasket