Before you plunk down $264 for the AFC300B-L, check out the link I listed above. The same product is less expensive. I paid a total of $221.72 including shipping.
Mike
The front end of my birkin is well planted at higher speeds. Not sure if this was the result of the canards (whiskers). I purchased the rear diffuser from Dick at Texas Motor Works. It should fit on most S3 sevens.
http://i52.tinypic.com/eqt9ar.jpg
http://i56.tinypic.com/vhdi09.jpg
http://www.carbonmods.co.uk/Products/Carbon-Fibre-Kit-Car-Nosecone-Canards__CMNCCSM01.aspx
I plan on upgrading my dash to CF along with billet switches and a Stack dash; similar to the R500. Will probably throw in a set of Tillets. Also plan on installing ITBs and a new ECU if time and cash permits.