the hangars aren't in the right place, nor are the flanges for the Y. You would have been better off going to a muffler shop and having a custom magnaflow exhaust bent, if would have been cheaper in the long run, also you could get it really cheap because crush bent instead of mandrel would probably be fine for you, since the fact that you're putting duals on says you don't care about performance, and crush bent is MUCH cheaper. Your best bet is to take the exhaust over to a muffler shop and have some cutom piping made, have him hang the exhaust cans cut the flanges off of the cans, then make a custom Y, you can have him put flanges back on if you don't want to cut the original ones off, but it will be much more expensive.