Hi, I have a 2001 Seicento S, its an MPI. I currently have a K&N induction kit atm and would prefer a better one, however they all seem to be for SPI seis =/, also does anyone have any websites with exhausts and other parts for MPI sei's? any help appreciated and thanks in advance.

Search on "GSR" and "induction" - then you will find your answer!

A good site for parts and stuff would be www.fastfiat.com