So I listened to a bunch of muffler delete videos and they sounded good. I browsed a bunch of forums and they said there was no drone. I went and got it done, and it sounds good, like a v8, but there's major drone. It looks like the pipes they put in are a little bigger than the rest of the exhaust. Could that be the problem?

 

You changed the Dynamics of the exhaust. Muffler deletes will always drone. You could add a resonator in place of the muffler to try and mellow it out