C-CA55-577-H25 is an Century Fuel Products custom built carburetor for Nissan H20-II and H25 engines. Like all Century Fuel Products engine specific carburetors, C-CA55-577-H25 is designed to be an exact replacement for the original Nissan gasoline carburetor. The carburetor includes custom manifold and airhorn adapters as well as the throttle cable bracket, return spring, and manifold gasket. The C-CA55-577-H25 is supplied without a fuel inlet fitting due to the multiple types of fittings used in different applications. The fuel inlet is a standard 3/8 NPT female thread. Available repair kits include the standard C-RK-CA55 Repair Kit. If you need a Lean Flow Air Valve Assembly please call in. Optional add on is a Nikki 6148-2961 F.I.C.D. Dashpot The cast aluminum air cleaner bonnet is a M1005 Nissan Bonnet.