I am curious if anyone has upgraded the ECM Chipset on their G37xs, and what information and recommendations can be shared. I have a new G37xs and looking for a bit more performance from the engine. I had an Audi with a APR 2.0 Bar chip upgrade that was outstanding, and could be manually turned on/off (chipped or OEM mode) from the cruise control using a specific code/sequence. Is there anything out there like that or which truly increases power and torque on the G37xs?

Welcome to NICO! For the Infiniti, the best bet is to start with typical bolt-ons. Cold air intake and exhaust. After that, an ECM tune would be in order.

Great. Where should I look for these? Do you have recommendations? Thanks.

I would recommend the R2C Intake. I have one in my 09 G37 and love it! As for the exhaust, there are a few good options. Try out this shop: http://tunerzstore.com/

There is also the G-Series FAQ (link in my sig) that has a link for aftermarket sites.

For ECU tunes I'd look at Uprev.