Make sure the secondary butterfly screw in the intake manifold have been loctited.
Also make sure the catalytic converter attached to the exhaust manifold has been replaced/removed.
Other than that I can't think of much. What concerns do you have? They are very reliable vehicles. I have driven mine from 38k miles to 76k miles and counting. I had to replace my battery, evap control valve, and my window motor. Other than those pesky, problems I have not had any down time.
Sent from my mars! 👽
- 2006 Nissan Sentra SE-R