The biggest problem I see out of the gate is they look to be 2.5" at the collector. I know other guys absolutely love the Mopar headers but I never had a desire for them for the same reason. I guess it all depends on how much HP you plan on making, but if you anticipate a big HP build in your future bottlenecking down to 2.5" at the collector isn't really that desirable.
This is the reason I ended up not buying the mopar's after all. I'm saving my money for a full 3" billy boat set.