I'll see if I can find a pic of the HO header, because it's the best you can get for our cars. You'll need to have some exhaust work done and your cat relocated or removed, but the gains from it are a lot better.
The shorty SPI headers are a direct bolt on. You'll need new exhaust gaskets, but other than that it should just be a direct replacement. I.E. no welding, no new pipes, it should take you... hardly any time at all to put them on, once you have them. Unbolt the old one, remove it, replace the gaskets, put the new one on. Also, you will probably melt your fan casing slightly. It's normal, apparently, so don't worry too much about it.
I'd like a set, but I'm leaning more towards the HO headers, they're cheaper (harder to find, though) and produce a lot more power for NA stuff (you can't use the shorties for turbo anyways.)
Erm. They don't really sell them online, dude, you have to go to a junkyard and pull them out of a 1st gen GT. Then they might need a little cleaning up, depending on their condition... But they usually run somewhere around 50 bucks. Whereas the SPI shorties are 200.
Well I ordered the SPI shorty header and the SPI down pipe I will keep you posted. It was made for a focus but I figure I can work it in with a high flow cat and 2.25" piping all the way back. I need more top end anyway