It has been ported and epoxied and in my opinion needs to be polished to smooth it out. Going with Accufab plenum and larger tb and do not need it. I bought it like this and have no other information on it, other than it came off a running car. $75 shipped
Click the link and browse thru photostream 6 pics of it
http://www.flickr.com/photos/btsf250/
Click the link and browse thru photostream 6 pics of it
http://www.flickr.com/photos/btsf250/
