I have not installed them yet but will be doing it this summer. TTI long tubes for me. I will have a chance to try out my new garage. I look forward to doing this mod, reminds me of my first time (installing headers). I'll have the classic rock and roll blairing to drown out the curse words I'm sure will come. I try real hard to not use any language at all when I'm doing headers. I've put on so many over the years and have yet to be successful in a curse free install. But this Challenger could be the one. Anyone who has done this please post and give us your experience with it.