The site isn't *that* bad. Just more marketing hype than real data that's all. Going up to stage 4 would definitely give you a good kick. Also, they do a good job of recommending things in the order that would make the most sense. The part about the plugs/wires is complete bullshit though. On an N/A motor anything but OEM plugs/wires will lose horsepower. Plus, crank HP is kind of a useless number. If you dyno the car you're going to get hp at the wheels, which is a bit lower than at the crank. If you really want to know the facts poke around on the SE-R Mailing List Archives for about 4 or 5 hours. Good luck!
This is also the kind of crap that some of the rice boys claim their hp numbers on. Not to say that this site is so WAY off. Theres this guy around here with a neon RT claiming he has 190hp. Right away I find this hard to believe because he has mostly exterior modifications. He says with just intake, exhuast, and ecu he got 190hp! Now I know most stock dohc neons dyno at 125-130hp, so these must be some really good aftermarket products he purchased
'95 200sx Se-R Stillen Exhaust, Weapon R adapter intake, 17" Chrome w/ Nitto NT 555, Arospeed Adjustable coilovers http://hometown.aol.com/ser0119/