What is the difference. All I know of is there being the water coolant passage and the exhaust sleeve. Is there anymore.

 

that is the one that I only know.

 

Thats it. I have used s4 Turbo housings in my s4 NA once the coolant passages were plugged.

 

So I have one good s4 n/a housings and one good s4 t2. The only thing I have to do is plug that coolant passage up and and port is to what ever size I need it to be.

 

IF you're using the turbo housing in an NA, then just plug the coolant port. You could swap the exhaust sleeve and put the NA sleeve into the turbo housing, or you could get another turbo sleeve and install it into your NA housing. They need to match, obviously.

 

Yes, you would need to make sure the sleeves match. I would recommend turbo sleeves since they can be ported MUCH easier.

 

I dont think you should be porting the sleeves anyway, just the housings.

But I get what you are saying, it is harder to port with the NA diffusers hanging into the port hole.

 

Aside from the diffusers getting in the way of porting, I think one reason you'd remove the diffusers is because once the port is bigger the diffusers probably wouldn't work as intended anymore, as in they would probably work against you.

 

Yeah that is true.

 

They probably do that to begin with.

 

I was going to do it anyway. The whole fact of putting a street port on my motor is basically to remove the diffusor.