It is generally agreed that a NeedsWings single CAI is appropriate for an N/A, however the dual ( DCAI ) looks much better ( and costs more too ).
The pipes are 3 ", I have a single NW CAI on my Roadster N/A, I run a K&N cone 3" neck x 6" x 3" filter just behind the grille.
One of the best looking ( and performing ) installations is the one by maxcichon - take a look at his gallery. He uses the enclosed inline filters.
Thanks for the reply. Very useful.... Atleast now I have some idea on where to start!
I did take a look at maxcichon Car and it's very impressive! I do notice many users are also going for the Blingy look thesedays!