When we talk about back-pressure we're referring to the torque curve that is mentioned in your quote. Sure, you can gain a couple of extra HP by getting a bigger exhaust, but you'll lose low-end torque and it gets to a point where you're better off with the extra low-end torque/take-off power than the two HP you might get when you hit VTEC.

And it's beyond me why people want huge exhausts that give you a headache unless the windows are open anyway.


So if you're running a SOHC D, go 2"