I believe they are 7mm spacers, I purchased them from Sunset Porsche parts. They widen the track minimally but improve the stance of the car.

Looks like the tips I ordered about a year ago were from Fedar. I have been very happy with them. They are stainless and have held up well. I just bolted them on and haven't touched them since. I'm fairly sure these will fit a 14 CD. I don't recall anyone mentioning the 14's being any different. I'm also fairly sure the gas V6 and the diesel tips are the same.

Good luck.