In this 2001 Infiniti I30, we installed a Pioneer DEH-P5900IB, and a SIR-PNR2 Sirius Satellite Radio Tuner.  This install was a bit of a throwback with gear from 2007 but still a drastic improvement over the 2001 stock Bose radio. 

HERE ARE THE LINKS TO Some PARTS REQUIRED FOR INSTALLATION INTO A 2000-01 INFINITI I30!