Searching is very helpful, there are a lot of threads on here about headers and their gains. But yes you will feel a difference, if you really have the cash for some goodies you should get a blox itm and bigger tb if you wanna get some more power of vtakk yo!!!
Megan and about every other taiwanese produced products are pretty much identical in design in diameter and quality. The 50 dollar headers on ebay will net you the same amount of power which is little to none