do i need a dashkit? to make t fit or will it fit out of the box

also the main thing is i need to find the wiring harness for this hu and my car? which im having trouble let me know what u used please i cant slice into the oem harness cause when i trade the car the hu is coming with me lol and stock being put back in

so please link me or tell me i only paid 232 shipped for mine so i thought its a good deal

Yes, you will need a dash kit...Metra should have one for your model.

I don't think you need a dash kit. I just installed a U310 in my 06 Subaru WRX, Which Im pretty sure has the same dash set up, and I didn't need a dash kit. Pretty sure all 02-07 Impreza's are the same. It fits very nicely in the Subaru double din opening.

You'll want to get a wirng harness to make it easiler and keep your factory plug intact.