New exhaust manifold downpipe nut, Mazda MX-5 & Eunos Roadster mk1, mk2 & mk2.5, 1989-2005, 1.6 and 1.8 models. This is a nut to fit the studs on the joint between the manifold and the downpipe. There are 3 of these used on the flange. NM01119. 813440355.