[seant2h]

Originally Posted by Alltezza

Since we're on this topic does anybody know the difference between the OEM Style Donut Flange and the Rear Style flange?


https://jdlautodesign.net/shop/ft86-...e/#prettyPhoto

The OEM donut style works as a pivot point (with shoulder bolts and springs) whereas the flat rear flange is a solid connection point. I believe that most of the catback systems work with the donut style flange, unless specified otherwise, so that they can work with the OEM midpipe.