NOS at this engine = death ?

today i asked for further info about the gears that i want to change and this mechanic tells me that its from a british 1.4 civic that its relations are shorter , should i go for it ?

ok i will change to 16 expensive to what according u ve said ,but we ll see

i drive some times many klms in motorwar but i wanna overpass some cars and i do it with difficulty, thats why besides i enjoy my car inside the city so my instict says to do it , but i wanted your opinion , some guys tell me that if u i change problems will start and i ll be all time to mechanics f...

hey guys i went today to ask for something a mechanic friend of saxo and he told me to put instead of the air induction as first thing the shorter gears, i dont know the exact word for that , i think u understand what i wanna say that , that i got long gears and if i put shorter it ll be better but ...

mine is also that weight 1 tone exactly with empty tank , i got abs and airbags , no roof , probably also the factory seats play important role