I ordered a set of
Forcewerkz CF side skirt extensions last week. They appear to be similar in design to the Downforce and Platte Forme a.g. extensions. It shipped same day and arrived via FedEx ground in about 4 business days from CA to MA. It's a 2x2 weave, 100% CF piece. Weave and finish was good and the fitment was excellent. They lined up pretty much perfectly to the OEM side skirts with very little to zero gap.
The only complaint I heard from Phil was the additional self tapping screws they provided were cheap.. So he ended up using rivets instead. There were no installation instructions either but it was not hard to figure out.
The ends are pretty much flush with the OEM side shirts
Forcewerks CF side_back by
leemik, on Flickr
Forcewerks CF side_front by
leemik, on Flickr
Looks pretty nice with the M3 GTS door sills
Forcewerks CF side_middle by
leemik, on Flickr
So much carbon fiber under the car waiting to get ripped off on our shitty roads D:
Forcewerks CF side skirts by
leemik, on Flickr
Forcewerks CF side skirts by
leemik, on Flickr
Image Reboot
image reboot.. v2.0 by
leemik, on Flickr