[bb]

I am going to change over the pipe that goes from the headers to the BAE Turbo on my 2.7. I am going to make the cross over pipe smaller. This should let the turbo spool up faster. The question is... I have a 2-1/4" pipe now. Should I go down to 2-1/8" or 2". I was going to go to 2" but am just wondering if that will be too much of a change. It is coming on now around 4000 RPM.

Thanks
Oscar