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I am Just wondering on my car i had to instal a FMU what exactly does this piece do for my car...is it better if i by-pass it or wat not please respond
 

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It rises the fuel pressure under boost. You can bypass it if you have 42lb injectors. If you have stock injectors - leave it connected. It can get lean and damage the engine.
 

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Yes, If you purchased a supercharging kit and have no other mods, install the kit as per the directions and you must use the FMU. Fuel issues will change if you have other stuff done to the car. If your car requires more fuel, you can bump and injector size but don't forget about your MAF. I have run 30# injectors with an FMU before. The FMU is designed to work with the kit as it comes and usually with no other mods. Hope this helps.
 
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