what is the best and most practical nitrous system for the type-s, and are there any other engine mods i would need to get before i got my system?

i would not recommend even putting a NOS system on but if you want to use the juice than dont go over a 60 shot

Internals, if you have money to spend.

Read up in the Nitrous Oxide section of ClubRSX. http://forums.clubrsx.com