Hi ,
First , for backdating , you need right and left air scoop , bolted on the fan.
You'll find these on this site.
Second , a pair of SSi or dansk oem.
Evidently , you must remove the factory blower fan.
You 'll need so the kit thats permits to install the hoses ,or cut off two holes , right and left , in the metal sheet.
It's easy to do with appropriates tools.
A pic of mine will be more explicative than words :
