Will this still make boost

[willysk8]

I got a hold of a ported exhaust housing for a t25 and put it on my spare t25. The only thing i see different from the stock housing is the wall around the blades it has allot of space between each other its not much of a space but just enough to ask questions. so my question is, Will it still make boost like this?????

http://i289.photobucket.com/albums/ll206/willy_sk8/exhausthousing.jpg