kEEP IT....selling anything you got is not worth it unless you truly gaine something out of selling it for another part. in this case you don't.
on the topic of power gains and shiit. EVERY CAR IS DIFFERENT.....lose low end power? BS, better throttle response? BS, nomial gains from an intake? BS. cuz you can't generalize
like we've all said countless times.. an intake is an intake is an intake. on a civic with 1.6 litres of RAW POWER...

you get very little gains. every car is different like I said so some other car out therewith an intake might loose some power... besides, such minmal gains in HP imo, is pyschological. you think you get more power but in fact its just louder....