is this a reliable source??

[Tourach]

I've been trying to come across information about s12's as well as s13's. I found the site www.200sx.org that has history and motor info. Is this site reliable?? and if it is does anyone know how well the CA20 2.0, 8V "twin plug" motor performs as well as how it is in comparison to the original s13 motor because i am lost.... Not to mention why in the hell does it have 8 spark plugs??????

Thanks for the input...