Well, I needed a header, and I needed one within a week for the test supercharger and the best solution I found was going with the pacesetter header made for the 3s-fe st184 because it was either that or wait for the header from Australlia and Genie which is also made for the st184.
In order to make the header fit, you need to drill out a few of the bolt holes, and drill out the holes big time on the downpipe flange and also power sand it down. I did this myself, but if I had the time to take it to a shop, I would and pay them a few dollars to do it.
It's true, pacesetter is junk. Get the genie one if you can, or go custom if you have $1,000 to drop. The pacesetter header isn't ceramic coated, it's just painted black. Not even hi-temp paint, so it comes off after you run it for a little bit. DO not paint over this, I made that mistake, and the pacesetter paint peeled and peeled away my paint too. Even the crappy paper gaskets they gave me were bad, I heard a leak, and had to take it all apart and reinstall it with new graphite gaskets that I picked up at my local auto store. SO if you are going to do this, make sure you get better gaskets then the ones that pacesetter sends you.
All in all, the sound is much deeper, and a bit lounder. Gains are minimal (they always are with the 5s-fe), but once all the paint peels off it will look bling. Install time for me was about 10 hours.