If you look at your pa50 subframe there is a 2 holes on that side. Bracket mount to the back of the subframe no moding.
I must say that the flange is so well made on these fit o so nice in the cut of the cylinder kits. It gives you super seal and you will need some 15mm long allen bolts.
Well that's what I used mount.
I did bend the bracket tiny bit back to line everything up.
Getting the cover back on is so much fun also with these it took a bit of wiggle jiggle finally slide down so it all fits. :)
I will get some pictures of that also tate thanks for pictures of that exhaust. Ed