I am seriously looking at getting rid of my 03 WRX for a nice, smooth, quick car with an auto/triptronic. Although that WRX is fun as hell to drive. It's just not very smooth.

The G35 sedan is at the top of my list. I'd like to know how much power gain I could get from aftermarket intakes and ECU tuning. I don't want to spend that much money though. So, forced induction is out of the picture. I probably won't even get a different exhaust system. How much money would I have to spend to get the car up to 300 hp?

Thanks

 

For a coupe to hit the fabled 300hp mark, you will most likely need exhaust including headers, intake, plenum, and perhaps even cams. All of this will end up costing as much as or more than FI. The Gs and Z are expensive to mod.