I have a set of 20G billet wheel for the TD05/TD06 and comes with the 3" compressor cover with anti surge port. This will bolt right up to your TD05 turbine housing and is an upgrade from your small TD05/TD05H compressor housing. For your Evo 1-3 turbo.
The anti surge port is machined into the compressor cover to prevent surge from running a 20G wheel with the TD05 turbine. The 20G wheel is also a revised version is and different from your typical 20G. It claimed a 15% more flow compared to your typical 20G
Compressor cover is 3.2" inlet and outlet is 42mm. Very well made, smooth and large internal castings. No porting needed and can be rotated in any location.
Free billet bullet nut for turbo given :)
This is the only one I have. Once its gone its gone!
Location is KL/Ampang/Cheras and along MRR2.
Thanks for looking.