I have a 2007 C6, black on black. I recently ordered carbon fiber from C7 Carbon. I received a front splitter, rear diffuser, ZR1 style side aero and the ZR1 rear spoiler.
ORDERING: Painless. They answer the phone, provide useful responses to questions and are generally pleasant people.
SHIPPING: Fast! Parts were so well packed, you would have thought they were hermetically sealed.
APPEARANCE: Nice. Clear coat was bright and defect free. glossy.
INSTALL: straight forward. Tip - don't use the pop rivets. Just use self tapping black screws. much faster.
FIT/FINISH: (Warning - I am a stickler for details). Spoiler gets a 10! Side pieces gets an 8. Splitter gets a 6, mold could be better but with a little fiddling we made it work. Diffuser gets a 10 for fit(rigidity of install), 7 for finish (fit up to car) but DAMN!, they need to redo the mold to get the area around the backup lights right. That area was disappointing. If that area was done right, the diffuser would be a 10.
Install time - expect 2 - 3 hours if you know what you are doing.