Not possible because my system is far different that yours. You have stock manifold and mine it TOG. :?

But if you're asking about my current set up, I can tell you that the exist is straight so it is more the exact angle of the flange that is welded on. To get it perfect you really need to do it custom on the car.
With mine it was easy because I lowered the entire exhaust system, threw way the stock downpipe, and cut off the Cat with a disc grinder just before the resonator. The pipe that goes into the resonator is only 2 1/2" diameter, so I had a muffler shop join a straight section 21" long 3" pipe swaging down to weld to the 2 1/2" piece.