I was about to purchase the $50 replacement pin slides from Advanced. It's the ones which the caliper slides on. I wanted to know if anyone knows about these. It says front and rear. There's a total of 4 pins. are the front and rear pins all the same? I ask because last time I checked there were 8 pins total.

All I need is to replace the pins on my rear brakes. The rear brakes are quite a bit smaller then the front.

Should I buy this kit? Is it the same sliding hardware for the front and the rear? Or is this kit just the upper pins for all 4 calipers?