My wife parks too close also. Found a scratch on front fender passenger side, matched the height of my son's bicycle handle, but nobody knew anything. I tried fine sandpaper to get it out, which I had done on my other car. To my shock it ruined the paint on my 2017 GT. So I had to have the...
It feels like the engine transfers heat more to the hood since I took it off. Not on top of the hood but underneath, if that makes sense. I didn't really notice a difference in sound.
Stock makes you feel like the car bounces at times. Kinda floating. FP track pack feels more grounded. A little rougher at times but not bad at all. Grips corners great.
If you have to ask if you can afford it, you probably can't. It was worth it to me. I can tell the difference on my car. I'm only speaking for myself. You do what you need to do. Cheers mate.