Thanks STBEAST. Yeah, I have seen photos of people with 20s and 21s with the cooler, yet I have a 22 without it? I too wondered about the studs which is one reason I just had the dealer do it. I talked to the tech that did the work and he said as the dealer, they are required to change them. He said they are rated as only able to be torqued one time, but he thought you could use Loctite, but then he's had some where people used it and they had a real hard time getting them loose. I didn't get a chance to see the fluid that came out, but the tech said that the RDU actually gets hotter than the PTU and I was wise to change that one as well. Maybe just a placebo effect, but I swear the car runs smoother and quieter than before. I should be set to 60,000 now.