National Stock Number
2990-99-177-7400
National Stock Number (NSN) 2990-99-177-7400, or NIIN 991777400, (manifold,air exhaust,emission) has an unknown assigned date. This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 36218. [A PREFORMED METALLIC ITEM WITH ONE OR MORE INLET PORTS AND TWO OR MORE OUTLET PORTS. IT IS DESIGNED TO DIRECT AIR PRESSURE INTO THE EXHAUST MANIFOLDS TO REDUCE HYDROCARBONS.].
This information was last updated on Aug 08, 2025.