better in the box than installed on the car. Let me know when you're taking your car to get them installed, and I can either shoot you the recommended specs or call the shop for you (I'm assuming RZT is doing it). Since Rich set up the last set of gears, I've located the "obsolete" inner pinion bearing for the Z32 diff.....it's the rear pinion bearing (different Nissan # but same manufacterer's #) from the Armada. Hopefully you won't have to replace it. Of the couple of dozen sets that we have had set up at our So. Cal. shop, only one needed a new bearing. It seems to be dependent upon having the correct tool to remove it off of the pinion shaft. It's pressed on and a bitch to remove. Good luck, Mark