from what I read a lot in the forums here at Honda-Acura.net is that 4-2-1 headers are great for lowend and mid power. So what happens if you install a cat back system? now that there are less pressure wouldn't it render the headers useless (meaning i'll lose the lowend for the power at the higher rpm range)?

Another thing, I know this is the stupidest question in the world, why would buying a better brand header be any better than a cheap one? the pipes look the same to me.

I understand that a lot of cars pipings goes all kind of directions, but its not that bad for 95 accord. It goes straight, then make a 90 degree turn and then fairly straight. So why would people still want straighter piping?

Does the stock cat and muffler really restrict the exhaust all that much?

Will the car still be SUPER if I just install the 4-2-1 header without changing anything else in the exhaust?

Sorry for all these questions people, Im new at this car stuff, and I just wanna learn and understand how things work. cuz some things are just so confusing.