I haven't weighed the car. So I would guess I am 15 lbs lighter than stock in just a wild guess. The big weight reductions are wheel. With the current Team Dynamic wheels and Accelera tire combo feeling much lighter carrying them then the Stock Design 5 wheels with Conti tires. And the the Sila Side exhaust is so much lighter than the stock muffler. The silicon intake tube is lighter than the intake baffle it replaced. Hood inserts are lighter the the hood material that was cut out. I would guess that is minus 40 lbs.
Added weight would be the under dash sub box 8 lbs. The rear mid hatch wing 2 lbs, front air dam 2 lbs. Rear roof lip 2 lbs, Chrome trim, mud flaps, window rain guards, bumper pegs, ram air side scoop 10 lbs.
Empty I would guess it is lighter than stock by a few lbs. I say empty because I do keep the jack, cleaning supplies and tool boxes in the car almost always.