So I've had SPC upper control arms installed on my G37xS sedan for almost 18 months now. Sometimes when I go over a hole or hit a bump in the road, I get a loud clunk noise which I believe is due to the UCA hitting the top of the fender body. I'm fairly low, at just about 26" from the top of the fender to the ground. Is there any way to mitigate or eliminate this noise or is it just something that comes with being low/having aftermarket UCA? I've had to put up with this noise for too long... It's pretty loud and freaks me out whenver I hit something thinking that my car is going to shatter lol.


Thanks!

 

I think you should first find out if your UCAs are indeed hitting the body. If yes, assess the damage and raise the car to see if noise is gone.

 

Put some white shoe polish on the top where you think it's hitting then drive and check after you hear it for mark