it a ct12 bearing housing and compressor. im using stock turbine end and turbine wheel as i dont really feel after my last build that a bigger ones is needed. i dont see that as being the biggest resriction and as i was building this for low boost response i thought it would be best. was gonna clip it back but i may do that at a later date.
its a ct9b wheel anyway so is slightly bigger and has the extra fin. sghould spin up nicely.