basically yes you guys are right.

Ive had mine in for a year. Its an exact replica of a DC sport header but stainless steel and welded together really good. It has the crappy flex pipe but mines holding up.

The exit pipe diameter is smaller than stock by but it has 2 pipes not one big one. But ultimately I agree that it probably only lets the same amount of air out the stock header. That being said its much smoother and much less restrictive than the POS stock header.

So I think that swhy my dynos showing more mid range, that and my jtune 5000rpm vtec. Makes the car easier to drive,but doesnt have ultimate max powa due to my tight arseness not ponying up for the toda.