sorry if this has been done a million times but tried a search and couldnt find the answers i been looking for, Im looking at booking a re-map but see people talking about stg 1 and 2, my car is a std 210 bhp model an i really need more go, i,m looking to go revo but want a bit of knoledge befoe going to book, obviously stage 2 will give more go but do i need any additional kit to go with this? as i say car is standard albeit a 007 valve that car had for x-mas, what is this switch unit on stage 2? so many questions, thanks in advance