So yeah as the title says how do I know what fits I'll supply any information if needed.

 

geez man. really. google bro. electronic stores. etc. sonicselectronix. **** most audio website i go to ask if i have a single din or double din.

 

or you could just call a local shop and hell tell you

 

naw man u have to check the head unit cross reference guide. look up ur year and model and it will tell u if it fits. lmao every head unit will fit even double dins. if u order from a good place they might even throw in a free wire harness and dash kit (honda items are hard to find not available at walmart)