That post was from our first tests and was with a angled out straight style exhaust. The 2 90 degree bends are killers that most normal looking systems have. We did a lot of testing around that same time and found that we could make the mufflers sit normal with side inlets and angled cores with very gentle bends and still get the same results as angled mufflers. Our bends in our normal systems are about 15 degree.