I have the system on my 260Z and another awaiting install on my 280Z. I couldn't get the angle anywhere close to what is pictured. I tried and tried to get it angled right with no luck. I tried turning the muffler end for end several times and ended up having the best results with an offset inlet and a center outlet. When I tried it the other way, the muffler can crashed into the body (might have been the bumper shock?). It's a race car so I really didn't care, but I'm hoping it fits better on my street Z.
Also, they changed the kit. I bought the first kit in 2013 and the second kit in 2015. The first kit's muffler was a Dynomax and the tip was a really nice, heavy part with a rolled end. The new kit I got came with a no-name muffler and a cheap chrome tip. I will probably swap the tips between the race car and street car.