Doesn't bother me at all. I don't intend to sell them so I don't care if it affects the resale value. In 2000 I bought a new truck and a friend of mine was horrified that I smoked in it the first day. He said "aren't you worried about the resale value?" Well, 16 years later I'm still driving it and still smoking in it. I bought the truck and the pipes for me, not for some possible future owner.