Glad I found this. I put a GT 2.0 LPF in my B4 a couple weeks ago. Running 422 Stock software right now with a Nemesis 17.5. Haven't had a chance to hit the track with it yet, but after about 8 minutes of hard running in the street motor temps were right at 150, performance was awesome. Wondering if anyone has experience switching from 422 Stock to 528 Stock, and if there are significant improvements running the 528 software? Particularly in motor temp, ambient temps here will be mid-90's or higher in another month. I've already heard about the Nemesis losing power when it gets warm, so the cooler I can keep it the better. Will probably pick up a D3 17.5 or 13.5 when I can find one, but Nemesis is what I have for now, so really don't need any of the non-helpful Nemesis bashing BS I got in the on-road thread. It's actually an Open class so we're not limited on motor, but the track is tight and slick. I think Joor is running a 13.5 without full boost, that should tell you something LOL.