very great info , but who in kuwait running upgraded turbo vtgs ?? i thought aziz long time ago was running upgraded GT2 vtgs installed them in his turbo ..

 

There is many others has modded vtgs now bro

 

Aha , good luck for them all bro !
You still running your car stock ?

 

what do you mean by extrude housings?

 

Extrude honing is a means of smoothing out surfaces and taking out material using abrasive putty like material under high pressure.
Extruded housing is extrude honing done on the hot-side of the VTG turbos to smooth out\increase exhaust flow.