The ONLY thing negative about the axleback is that it's missing a rod to connect to the right rear OEM bushing (as you can see on the picture of the coated axleback).
If somebody follows your car, he'll notice the tips moving when the road is bad. I had two people who told me the same thing so I had an extra rod welded to correct the situation.
I did tell CP-e about it, but never got an answer back from them.
But still, I love the sound and you can really see the quality of the product
Downpipes look amazing BTW!!