Ok, this might get confusing to read so I apologize in advance. So I am planning on installing mini race bullets on my car. They are 3" inlet/outlet while the car has 2.25" pipe. So I ordered a pair of 2.25 OD to 3" OD as well as a pair of 2.25 OD to 3" ID reducers. The mini race bullets are 3" OD on one end and 3" ID on the other, which is why I went this route. However, two of the 2.25" ends fit into the 2.25" ends on the other pair. Which shouldn't happen since they're all OD, right? On top of that, all four of the 3" ends are exactly the same size, 3" OD while two of them should be ID. So they are the ones that should be able to slip together. Am I missing something as far as how exhaust pipe is measured or does Summit have a mistake in their parts?