I know I'm sorry I'm sure there are threads on this already but I'm at work...is there an ECU reflash or some chip upgrade that can be done to our cars to add HP that's not crazy expensive? Prices?

 

Yes there is an Technosquare is the company your looking for... There located in torrance (310)787-0847

 

I'm located in NY is there someplace around here I can do it? what are the prices?

 

Don't know of any places in NY that offer this service... Tadashi really knows his stuff.. A tune runs $550.... And an hour long dyno session runs $150...I'm hoping to be going there soon....

 

How big is the power increase? And does it void my warranty?

 

The power increase depends on the mods you have. A typical G37 w/ basic bolt-ons (intake, HFC, cat-back exhaust) get about 20~30 whp from what I have seen from ppl who got it done on this forum. Not sure about the warranty, but I would think yes if the dealer can tell that you had ur ECU flashed.