New headers TTI or Doug

Collector are the same 3" sizing for dougs and tti steps.

Oh thanks! Then what is adam talking about?

And also I think If I jsut wanted performance from my headers I would go Hooker Super Comps, but I rather not scrape them, as I already do with my Summit Flowtechs. Will going to doug or TTI improve power of my motor over the Summit brad headers which most say are repackaged Flowtechs?