We highly recommend against purchasing some high flow cats and having them welded in due to the complexity of the exhaust pipes, the proximity of the bungs and the angles that the cats and entry pipes need to be at. You will probably end up spending around $200+ for the high grade catalytic converters that in the end may or may not be suitable for your Charger, plus another $200+ for the custom welding. In the end it probably won't be any cheaper and with the welding that is irreversable, if you're unhappy with the welded results or if things don't work out as well as you had hoped, you're stuck.
Our prices for the 5.7L JBA catted pipes are $409.95 + $19.95
Our prices for the 6.1L Magnaflow catted pipes are $375.00, shipped.
Thanks!
Joshua, HHP