I have a 2012 G37x. A couple months ago I did a few things to it. Stillen catback, Hotchkis sway bars, swift springs, spl end links front and rear, spl rear camber arms and cusco tower brace. About a month after the install I started getting alot of noise from under the car, like something was loose or the exhaust was hitting. I went crazy trying to find what was making the noise. I checked and double checked everything. It was so bad that I didnt drive the car unless I had to. I could not figure out what was making the noise. So my gut feeling said it was the sway bar end links. So I ordered Moog endlinks front and rear. They sure look strong enough to handle those sway bars. So once I took the first SPL endlink off it was it was obvious that was the problem. The mounting bolts that go thru the hardened ball were lose in the ball and that was making all the noise. All 4 were screwed up. I installed all the Moog endlinks and car is quiet again. So I sent a email to SPL telling them what I found. I also said I wanted a refund. They immediately got back to me and said there was a manufacturing problem that they were aware of with these end links. They would not refund my money but would replace all of them. I was impressed with the quality of the Moog so they are staying. So if you have SPL end links and a annoying noise under your car its probably the end links. I am taking the replacement end links from SPL and I will sell them.

 

I had the same issue about a month ago. Replaced the endlinks via SPL warranty replacement and no problem since.

 

That's what my G is doing, I just drove it to Ocean City MD. 323 miles each way , car ran great, felt good...But if I back out of a park space or take sharper turns, particuraly on the drivers side, I hear clicking.. someone said bearings, I said no, I know what that feels like especially driving over 80-90 mph. So I think this is my issue as well. Thanks...Imma get it checked out