Real solid. From what I've seen from the RBs they hide that of that huge midrange hit and the pull is much more linear. What's your launch(dead stop brake boost) look like? Can you build up any pressure?
I'm assuming you or your installer preformed the swap on a lift. I guess I'm starting to gear up for a turbo swap and figuring out what kind of time frame. It looks like this is a weekend job for sure.
2007 335i Sedan
1991 Toyota Supra, 1JZ swap, T66 single, supporting mods.