for ecu's:
http://www.technosquareinc.com/nissanflashlist.htmpiggy back:emanage ultimate or Apexi Neo, Apexi VAFC2
Internals: jimwolftech, VQ35de cams, atomicspeedware.comThe best thing to do is goto your local machine shop and talk to them about internals. Most companies have rods and pistons or can make you a custom set.. I know Pauter has rods. JE pistons, Wiseco Pistons, Cp rods, Eagle rods, Arias Pistons..
Take a look at this thread I started:http: / / forums. nycmaximas. org/ showthread. php?t=27798