+1. Awesome in 4wd. The GT 2.0 LPF is great for 2wd, but doesn't have a fan, so I don't like for 4wd. I run the 205 Mod software (no boost or turbo functions) and it's flawless. Who needs boost or turbo for motors b/w 5.5 to 8.5? The added benefit is of course that you can switch speedo firmware depending on application. We have one tight, snot slick track that we run. When we go there, for 2wd I got to the 323 Stock and run a 17.5 D3 with boost and turbo.