Z1 shows the ring gear bolts (listed as oem differential bolts) to be part #38102-7S000 and shows that they fit year models 2004-2006. I have these bolts, but my car is a 2003 so I am worried that they may not fit. Nissanpartszone.com has a similar bolt (listed as bolt-drive gear) with part #38102-10V00 that shows it was replaced with the bolt part #38102-7S000 a year later.

My question is, does anyone know if these are the same bolts?

I have the same problem with the spacer housing. The original part #38165-0C010 was replaced for 2004 with part #38165-0C020 which is what comes in all the diff install kits.

Are these parts interchangeable?

Thanks