Has anyone heard anything about these kind of headers because these are they ones that i was looking to buy and i want to know if they are a good choice?

 

How much are they? If they are stainless then I'd suggest going with Kooks as they seem to be considered the best you can buy by a lot of people. I believe T-byrne has Kooks for about 830 and ypipe for 200 or 250.....also Extreme sparkplugs is (or was) running a GP on kooks with a great deal on the price. It was scheduled to end Apr. 30 and I was going to jump in on it but I quit my job so I kinda need that xtra cash right now

 

Just installed the Supermaxx system on my 02 Z28 a couple of weeks ago. Hi quality, very complete, great instructions, installation was a breeze. One minor thing, I put a spark plug wire insullation sock on one of the OE spark plug boots because it was touching one of the header pipes. Also, if you have SLP bolt on sub-frame connectors you will have to modify the drivers side connector do to interfernce with the Y-pipe.
I can feel a difference in power after the install. I will be taking it to the dyno to see what I picked up.
All in all, a great system, IMO

 

I have them as well, a very high quality system. The kit comes with everything including o2 extensions and high flow cats. None of the other systems I looked at come this complete.