Well, Blouch will be working on my turbo today. I chatted with them about the upgrade. For the Subarus they normally do NOT upgrade the exhaust wheel to the larger TD04HL one. However, they do a 10 degrees clip on the wheel. I also asked about not getting it clipped and he said he won't do it unless it gets clipped, as he had worries about flow at higher RPMs. He also said, from shops that have tested it, there is very little loss from the clip, and a lot gained, so basically don't worry about the clip.