if your looking for big bragging numbers the header will not do it for you.

sorry to say but Honda made the engine 95% perfect you only have a 5% room for power improvements unless you go SC.

Bottom line you won't get more than 10HP you will even get lucky to toch 8hp.

the header changes drivability characteristics. it's more free reving, and it feels more spirited compared to the stock.

I have the Amuse and i didn't notice a big power increase or any power increase at all, the only major difference is how the car pulls and revs towards the upper RPM band.

Over all great product worth every penny!