Install within a Couple of Weeks so that Molded Shapes do not fall - Install at room temperature (70's)
ACC Installation help videos are plentiful Online
YOU CUT your holes for Seat Seat Belt & Shifter etc. on most kits - some kits are precut, you will be able to tell from the main image photo
The carpet is INTENTIONALLY OVERSIZED - this allows for a little room for error with your install. So yes, you will likely need to trim the edges when you have the carpet in place.
DO NOT CUT until you are satisfied with your loose fit - once you make a cut it is yours.
***ACC flooring kits CAN NOT be returned if you cut or alter in any way. If you think you will have a fitment issue or do not feel that you can install, let us know PRIOR to cutting.