Re:5th injector
 

Damnnn sounds awesome man.
Yeah get rid of the stock exhaust...I did that...mated my 2 inch downpipe to the stock 1.something" stock exhaust and it killed ....spooled late and boost fell of at 6500 rpm...with the downpipe only the car ran awesome.
Try looking in the Ford Fiesta...they also have the EDIS system...some of them have it. I think we got the one on a Sierra if I'm not mistaken...I don't remember though