I had a set of H&R springs and KYB/AGX's installed last Thursday. Over the weekend I startet hearing a sound that I had heard once in a while with my oem setup(I thought this sound was because of my old struts). It then turned really ugly. My right strut mount wast totally busted. I guess the stiffer suspension broke it all the way. Well, I had new oem Nissan mounts installed today and the car is nice and quiet again and rides very smooth, it has not felt like this in a long time. I replaced just about all the oem parts that are recommended here on the org. but I did not replace the mounts. Bottom line if your car has high miles like mine (around 100k), I recommend for you to change them out if you intend to put in new springs and struts. This way you will only have to take your suspension apart once.