I'm building my WRX/STi hybrid as most of you know.

I was planning on going with the VF39 and almost had one in hand until I was outbid at the last 5mins! Damn ebay!! LOL

Any way I'm considering a few diffrent turbos :

VF22
VF30
VF34 backordered everywhere!
VF39...but worried about boost spike and cracking.

Big 16G
18G
20G

My only worry about these last 3 is that I've seen the pics of them and they don't look like they are bolt on. Do they require additional modification?

I am going with sti pink injectors so I don't want to max those out so it has to be able to accomodate that.