do they really work? or is it just bs? cause i dont wanna pay like $50 more for them if their not gonna work? do you u need anything else besides the header itself?

 

I dont have those headers. I have the dual outlet headers, but I wasnt planning on using the 6 ports, so I didnt pay extra for the headers.

With any normal exhaust, though, they will work as advertised. The actuators only need a few PSi to operate, and even straight pipes with mu mufflers at all still have ~2 PSI. Straight through mufflers like the Apex N1 will add 1-2 PSI, same goes for silencers. Chambered mufflers like the RB ones will add a little more, like 4 PSI or so.