There's nothing wrong with it, you'll get .25HP instead of the couple HP's with a real intake. The engine can only suck in as much air as it can push out, this is why an aftermarket exhaust should be used.
Good tips:
Don't waste $$$ for a $50 air filter
BUY A HONDA REPAIR MANUAL -
www.helminc.com
Buy & read some Honda/Acura performance books -
www.amazon.com