Go to their website, look up your exhaust, and find the instructions. I know they had some way to fix it if it were crooked at the end. I think you just have to bend the things that hold the exhaust bushing up or down.
What @My spoon is too big said is pretty much right on. The metal exhaust hangers can be tweaked to get it to line up correctly pretty easily. It is rare they are bent wrong, but occasionally in shipping and moving they get slightly off but it is easily corrected.