i dont know what its made of, Some kind of Aluminum im guessing. It does look cleaner up there but i have the RBC manifold and its different then the usual pics you see online. It actually goes on my manifold and i have a bunch of lines that run through there and dont feel like rigging anything up. I guess i can try scraping the threads of the housing where the sensor goes in and on the ground thread also. Its Black not metal, idk.