This is a big one and missed a lot of the time, it doesn’t matter how much money or how little you spent on your car. We judge how well it was installed. We judge the car as a whole for this one.
Something as simple as body gaps, bumper fitments, installation of aftermarket parts. Are all your hose clamps lined up, same style? It comes down to the small picky stuff that will set you apart from the rest.
Take your time to get everything clocked and sitting perfectly, go full OCD for this one