I have recently been watching the Halltech header development. They are titanium and according to Jim Hall can remove 60 lbs from your car. Not sure about the O2 sensor connections (whether he uses 4 or uses two sims in the rear like the LG's) and whether they are emissions compliant. The photos I have seen to date don't seem to show an air hookup. He hasn't finalized the design yet from what I understand and some of the comments he has gotten on what people want may feed back into the design. He is also planning a stainless version as well. This is a Tri-Y setup so I don't know how much power they will make compared to the LG's. Right now I am leaning towards the LG's, but am watching these others for dyno results. Since I probably won't pull the trigger until late summer, I will just bide my time.