I think the only real difference is the exit where the link pipe fits on a 6th Gen is about 5/8" shorter for easier fitment, but they're otherwise identical.
Size matters... check ID & OD dimensions. OEM sized exhaust gaskets do squish and stick out into the exhaust gas stream with these headers. Thatโs why Lance and Darryl sourced the larger diameter Delkevic gaskets to help optimize the performance of these headers.