[icingdeath88]

I doubt it would make any noticeable difference in gas mileage unless you drive it differently (feels faster, so you drive it faster). Basically the point of the stage 2 ECU, injectors, and MAF is to support some other power-adding mod, like a turbocharger, 11:1 compression ratio engine, or even just cams, etc. The stock MAF only supports up to 250hp, and the ECU and injectors wouldn't be much past that. The stage 2 stuff will support much more, but by themselves, they wouldn't actually just magically add all that power. The tuning of the stage 2 ECU will make a bit of difference though. TCU = transmission control unit; ECU = engine control unit. Separate computers in the car. Automatic transmissions are controlled by a TCU, manual swapped SVXs don't need them anymore. I think Gamesy's car is getting a 5-speed, btw.