According to what we found, it was different numbers, which was surprising. And of course, more expensive..

 

So, a bit of an update. Shortly after starting the thread, we couldn't find anything halfway reasonable in cost for headers. The shop guys told us that there would likely be more maintenance for headers, and that after a few years we would likely have to change them out as well. So after humming and hawing, I agreed to just go to stock manifolds and the limited warranty that it was worth.

Went with a "cat back" system which due to poor communication with the shop turned out to be pretty much a new muffler. According to the shop, they couldn't make new pipe any nicer. Deleted the resonators at the end in favour of a nicer exhaust tip. The end result being, it sounds much faster and maybe it's good for a couple HP, and some drone due to having no resonators.

Really like the Magnaflow sound.