the reason why rinagi said so because this topic has been discussed in detail somewhere in one of the threads earlier and the explanation, pros, cons and pricing has been listed there
if u have ample time, it is best for u and all newcomers to go through all the earlier threads rather than posing a "blind question"
every things seems fine until i got misfiring problem ever since i got the car... at first just need to touch up the tunes but after awhile every thing went wrong.. check everything (wiring, sensor, pipes, plugs and...