I just bought a Pioneer DEH-P7900BT head unit, and I still have the stock radio in my 1999 Civic LX. Will this new radio slide right into the slot and fit correctly, or do I need some kind of Honda install kit to make it fit? The new one looks slightlynarrower than the stock radio.

 

Dash kit and wiring harness, check ebay.

 

you could also go to a car audio dealer, such as best buy or visions, and buy a dash kit/wire harness. i got both for around 30 dollars canadian. dont let them install it, unless you dont know what your doing because they just rape you of your money.