BMW x3 3.0sd 335d

[RimasRS]

Hello
Which kit should I buy for remapped BMW x3 e83 35d,
Engine is the same as 335d. My curent setup is DPF delete, egr delete, swirl flaps delete. Remapped.

1. Which kit to choocse, which nozzles, which tank?
2. Will it work with only water or meth mixture is also possible, what mixture?
3. What gains I could expect during the winter or summer drive?
Maybe some other advice?
What else do i need to run meth?