2015+ exhaust manifold vs older

Originally Posted by husam2012

Just letting who might be searching for this in the future; the 2015s do have a better exhaust manifold design. They actually don’t bolt up to the older engines because the studs are in a different location (the older heads don’t have 4 stud spots)
The pipes flow smoother and it’s more than likely that this causes the newer cars to dyno slightly higher.

Originally Posted by Jhill

So it sounds like the heads have an addition stud? So in theory one could mount the new ones and use the flange as a template to drill and tap their own holes and add studs?