HDDP, can you add more to this?

I talked with Kleemann about making some headers. First off, SUPER nice people. If I hadn't told Renntech I was getting their computer and pulley, I would have gotten it from Kleemann. Anyway, they said they would build a set of headers, but they'd be expensive as hell and no clue how much performance gain you'd see. They'd also need a donor car and would want to do it during the winter when things slow down a bit for them. He said the cost would be around 3k a set. I assume most aren't willing to pay that, especially when limited to the SRT-6.

I'm throwing the car up in the air today to get a look see. Hopefully I can figure out something. I want to make a true duel exhaust and get rids of these cats. Does anybody make o2 sensors for our computer? I emailed Kleenman about programming the computer to not throw the code, if that was possible . We'll see if they get to me over the weekend. Has anybody put high flow cats on their car yet?