I had some on a 71 Dart I drove every single day. It sat stock ride height. I never scraped the headers on anything and I drove over many speed breakers. They do hang lower than other header makes like Dougs and TTI but I knew that going in and I left the car at the stock ride height. Plenty of guys run these type headers with no trouble. Yes, if you hang your junk low in the weeds and run short tires, you're asking for trouble, but otherwise they work well.
