u/Current-Yesterday902

Could anyone please help me figure out what this piece is?? When I bought my bike it ran like shit. I swapped throttle bodies with my cousin and it ran like a raped date. I bought a used throttle body last night but I want to replace the things I can ( injectors stva tps ect ) but I don’t know what this is and it’s driving me literally insane. Google is no help and chat gpt is no help!! Any help is appreciated