Hey, I recently bought an S5 turbo to swap onto my S4 TII. When I got the S5 turbo, I realized that it had a bit more shaft play than I would like, quite a bit more than my S4 turbo that is on my car now.

My question is, can I just swap the S5 turbine housing onto my good S4 turbo? (I already have an S5 manifold btw) From comparing the S4 and S5 turbos, they appear to be identical aside from the turbine housings, and some quick research confirms that.

 

Yes, you can swap the turbine housings.

 

That's what I did! Just be careful with the blades when taking it apart.