The Stock OEM 2004-2006 Nissan 350z clutch fork pivot ball is made from a weak carbon steel. This upgraded chromoly clutch pivot ball will give a 30% increase in strength. This is especially good when upgrading to a higher pressure clutch or a multi disc clutch that will put stress on the weak stock pivot ball. We strongly recommend replacing this part with any aftermarket clutch install for piece of mind! Don't get caught paying for a clutch install twice when the weak OEM pivot ball fails with your new heavy duty clutch!!
This Pivot ball only works in the 2004-2006 Transmission. So if you have a 2003 Nissan 350z with the original transmission you will need the longer pivot ball found Here