Originally Posted by HDDP

Kleeman's price is about right for a custom header, the set I have on order (pending $) is going to cost me $2,700. I had Burns Stainless do a flow analysis on the engine to determine the optimum design for the N/A Crossfire. Obviously doesn't equate to the SRT. But the OEM headers and exhaust system are VERY restrictive. I would guess a good set would boost hp by about 5-7 hp.

Still haven't found anyone who has an 02 sensor bypass. And that does pose a problem if you start messing with the cats. Mine have been removed completely and i believe the sensors are trying to dial back the fuel mixture and leaning out the car.

Either way, I think your best bet is to clean-up the airflow on this car, intake and exhaust.