Water/Meth injection?

[LongBaz]

First time poster on here, so I'me not technicaly savvy.
I have a TVR Chimaera 4.8ltr with a turbo on MS 2. It produces 523bhp/580lbft and has run 1.51 60ft -10.9 @ 132mph.
I have a new DevilsOwn W/M kit that I have recently bought, because it was going cheap.
Question is............
Will it make it go faster (I want to go faster)
Will I have to get it remapped.
Sorry if these seem dumb questions, just looking for opinions.
Many thanks
Barrie

[LongBaz]

Thanks for both advice.
Barrie