Are they stainless steel? Do you have a link to the auction?Just installed these tips I got from eBay for $43 shipped from China. They are very high quality and really easy to install, they fit over the stock exhaust so no need to weld anything. I tried the angled look so that the tips fit completely under the bumper, but I decided to have them straight out. They do hang out a little bit but nothing too serious.
The clamp system works very well, they are very secure and there is no movement at all.