the general idea seems to be that the one K-Tec do could actually hinder performance rather than possibly improving it if you moved the filter to somewhere else
i noticed BB do one aswell for their turbo conversion
http://www.bbperformancetuning.co.uk...t.asp?id=70697
is that one just as bad ?
the Hill Power one, is that better, will Nick sell them seperately ?
i may have info on another one today :D