I just installed my Hot Shot Headers. Let me tell you, it took me a good 6-7 hours of work. Our header are filled with emission parts. Pleae note, it you are going to do this yourself, make sure you have a lift.
1. Not all the holes matched up, so we had to file one of the holes bigger to allow for proper fitment.
2. The EGR did not align with the new header, so I had to disgard it.
3. Make sure you order new gaskests, cause they don't come with the kit.
4. Use WD-40 on all bolts, or your going to strip one of them, and some of the washers will not fit properly on the header, because of the bigger diameter which place the weldings closer to the bolts.
5. It was a pain in the A$$.

Was it worth it, well beside the fact I called my SE-R every name in the book, I must reply with an astounding YES!!!!! I have the PR CAI and Pacestter cat back as well. With the addition of the header, the car drives with much more force. It wants to keep going in each gear. I live in Germany, I am in the military, and on the autobann the car really shines. It hits 125 with brute force, if I had the JWT ECU I know I could hit 140 MPH. The car feels so much stronger in each gear. I payed 400 for the Hot Shot header, it was well worth it.
NOTE: I have to change the cat, so I ordered the CAT-CO CTO-6806. IT DOES NOT HAVE Flanges!!!! So, I decided to take it to the muffler shop, I have decided to have the front flange of the the pacesetter cut off, welded to the front of the cat and have the back of the cat welded to the front of the cut exhaust. I will post next week on the results, waiting for the cat bracket.

Congrats man, my car was down for 3 days trying to get the header installed. But I went the wrong path. Anyways, did you think of recycling the flanges from your old cat or flexpipe? Flanges can be ordered for pretty cheap as well....

The EGR tube didn't line up on the 2 high port engines I installed headers on but I figured out that if you loosen the bolts where the EGR tube goes into the intake that it makes lining the EGR tube up and reinstalling it alot easier.

A better rust penetrant is PB Blaster which I know you can get here in the US at Napa. Don't know if it is available in Germany.

Stuff works incredibly well.

I almost bought some of that stuff. But the claims on the can sounded too good to be true! Does it walk the walk?

It walks good , your ass to the hospital almost went blind with that stuff were glasses when you use it got it in both eyes last year... sucked big time but it does work on bolts 2....