verify
 

i just want to verify that if i take the exhaust ports out of a S5 t2 housing and put it in my S4 na housings will i be able to use my NA housing with s5 t2 irons or in a boosted application.

also want to make sure that if i get a s4 counter weight and a s4 t2 rotors can i use it on a S5 t2 eccentric shaft?

please let me know as im trying to piece togeather a engine after being slaughtered on a deal with a horrible t2 engine.

You can use the NA housings with the S5 exhaust sleeves. You will also need to drill and tap a line for the turbo coolant line.

All FC eccentric shafts are the exact same.

ditto what Farberio said, this information is out there if you look for it. the coolant passage only needs to be tapped on the rear rotor housing and ONLY if you are using a stock or hybrid turbo.