This 500 CCA battery replaced one in excellent condition, but only 385 CCA. The difference was dramatically better cranking. Part of the Yuasa's advantage is the high conductivity long brass threads on the heavy terminals, so a lot less voltage is lost as compared to the conventional terminals. The screws that came with it, however, were not long enough to take full advantage of that, because of the thickness of the bike's cable terminations, plus two accessory eye terminals, so I used longer screws I had on hand. It came with excellent star type lock washers to make better connection without loosening under vibration.
I'm very happy with the performance and design. The case has a place to grab the 27 pound battery from the top to make it easy to lower or lift it from the top.