This reproduction air cleaner is licensed and approved by GM. The air cleaner ships fully assembled (all parts shown are included) along with installation instructions. Both 350 and 455 are available. The difference is in the foam height so the air cleaner will seal to the air induction hood.
OAI kit includes: main body, flapper door, vacuum motor, metal air filter lid, air filter, 455 or 350 foam seal, lower base rubber seal, vacuum hose, drain hose, 2 hold down springs, 2 valve cover retainer clips, rivet and spring clip, and 2 screws (to attach the vacuum motor).