Whats the best ECU that I can get ~
Also was thinking about getting high-flow cats and crawford plenum, will they make my car louder?? I mean how louder will they make?

 

Do you mean to ask about the best ECU reprogram, or do you want to replace
your computer?

 

replace for a new after market much better one ^^

 

Huh?? I didn't know the ECUs in our cars where so bad they need to be replaced?
Are you going to run a full race setup? This will definately void your warranty.

As for the exhuast question, there are lots of threads about this already about this.
Try doing a search.

 

If you're staying N/A you don't need another ECU. Some people prefer to have their stock one reflashed but no one who is staying N/A will be able to benefit from a NEW ECU...

 

i see i see thx !
Will Crawford High Flow Cats and cast plenum will make my car a little louder or.. much louder?