The D60 calipers are very heavy and suck at braking in a JK. We put this on my brothers ECGS D60 last summer. The calipers are so much lighter and stop in a dime and hold with little pedal effort.Seems like a worthwhile upgrade! I've never seen this before so I did some Google-fu... they (BK) say it's close to 83 lb savings over OEM calipers and rotors. You forget sometimes just how heavy 1-ton stuff is. To this day I'm still surprised at how light and easy to lift a D30 is. I can usually muscle one up on a set of saw horses by myself without any issue. Trying to get my UD60 out the crate, I about blew my back out just taking the covers off the crate
