Another thing of note is a LOT of people have had problems getting "the best" TTI and Dougs to fit. I'd never do it, but a lot of people have dented and even what I would call smashing tubes to get them to fit. I'd send them back. The only thing I've EVER had to do with the "cheap" headers was get two prybars and pry the tubes a little more apart so they won't rattle on the torsion bars.......and I've used a LOT of them.