There’s some weight to be lost in the rear bumper support. I do not condone this activity, and it’s awfully stupid to boot.
Note: I will not use this on public roads, nor do I recommend that you do. I also probably wouldn’t recommend this on track, but this a pinch fix for proof of concept on another project that I’m working on. Use at your own discretion; I take no responsibility if you hurt yourself or your car.