the only reason i know about it is becuase i bought a bunch of piping from this guy and basicly he just gave me a box of odds and ends that were in the box and it had one of those maf adapters and he actually found that one of the adapters fit a greddy type s bov so the bov was connected to it, and ad first i thought it was a bov adapter then found it was a maf adapter which i thought alot of guys on the forum might actually like it, its 3'' in diameter and it has those black circle looking things that go inside it to decrease the diameter its pretty cool. since im running a map sensor i cant use it,so i dont know how well it works, but it definitly looks like a good thing