I was jus reading up on some intake info and I wanted to know if someone could explain to me what a resonator is, what it does and where it is located? And what is the ECU? What do they mean when they say reset the ECU?

 

The resonator is the box that is in the fender under the headlight. It does exactlly what its called resonates the intake noise so that you don't hear it outside of the car.

The ECU is the Electronic Computer. When they say to reset the computer. They mean to remove the backup fuse for the computer. Which will reset all the codes and values that the computer has stored in its memory.

 

ECM = electronic control module.

 

Don't forget the exhaust system too.