Pacesetter doesn't make headers for this truck and have not for years. Pacesetter does not and probably will never make the headers for uneven paired port heads again for this truck, I have tried everything to find them, as well as speaking with pacesetter personally. They can't build them unless they get a large order to make it worth their wild. They still have the pipe bending diagrams though.
The header arrived today after only 7 days travel from Australia thru customs and to here. The header is more than I expected for sure. The metal is much thicker than prior headers I owned and for the pipes, after measuring the header parts they are exactly the same. So, I don't how you measured the picture for the lengths, but you must of calculated wrong. The welds are very strong looking and the plate to the head is 10mm thick which is very nice. No warping for sure.
As for the power or torque design, this really doesn't matter to me since my truck doesn't put out enough of either to even notice or measure those minute changes. All I know at this point is, the builder has been making them for over 25 years and Australian performance items are as good if not better then some of our own country items. They don't have to deal with our stupid smog laws on at such an inferior level. I will never have to deal with another cracked exhaust manifold made by Mitsubishi again, the price is...lets say...affordable for me! I really don't think either way of torque or power is going to make my truck a different truck that my seat of the pants will notice drastically. I know the mpg will be better right off, sound will be better from that casted iron boat anchor that was installed stock. So, until I put the header on I really don't know what it will do. As well, I probably will never know the exact performance of it because the truck is just a truck and bringing it to a dyno so I can get some fancy numbers is never going to happen. As for a cheaper header, I think I have done my research far and beyond what most people do. I have searched for literally years to find a header for this truck. There are just none to be found in the USA except those nice headers our forum creates. All in all, I am happy with what I purchased and I wouldn't hesitate a second to do it again. Having the header in my hands makes a big difference from a picture and these feel like they are built strong and will last longer then the truck will.