I installed them, they haven't made a sound since I installed them about 500 miles ago (I know not much time left to test). I'll post again later if there are any issues with them, but I don't see that happening. I bought these to replace a factory brand that was installed at a large auto parts store and only lasted 20,000 miles before wearing out. The original car upholstery lasted 75,000 so I hope they last at least 50,000. Before anyone asks, yes, the calipers move freely, the mounts are not