I know I have a exhaust system but its 2.25 pressbent

, Im going to go with 2.5 mandrel bend
Ihave the downpipe down pack but I need some help with the cat back
Now for the downpipe I have
1 90 degree pipe
2 flanges and gaskets
flex section
2 45 degree bends
Now for the catback. I having trouble finding out what angles I need for the part of the exhaust thats bends by the back wheel!!!
I remember seeing a thread a WHILE back but cant seem to find it. It had all the bends
thanks