There are 2 versions of the brodix head, here is the summary I just copied from the Tech archives as written by Ryan J.

"Brodix B1-BA: Cast Aluminum. 59*. Closed chambers. Uses stock intake, Stock rockers, stock headers. Fully ported will flow ~300/220 cfm. More $ than E heads or W-2. Not very popular most likely due to cost. Overall a good head that is better than an Edelbrock, but no greater than W-2.

Brodix B1-BA-MC: Cast Aluminum. 59* Closed chambers. The MC stands for Moved centerline, and is designed for a bore larger than 4.10" Offset race rockers required."

Hope that helps.