If you want the highest quality gameplay experience on standard hardware, you do not need mods. You can optimize your physical setup to get the cleanest, lowest-latency image possible.
If you are still experiencing issues, or are looking for the absolute latest version, you can always check the official Nintendo Support site . If you'd like, I can: update mario kart 8 deluxe 303 extra quality
For a game that is often considered "finished" after the extensive Booster Course Pass, these continued updates are crucial for maintaining the "extra quality" that Nintendo is known for. If you want the highest quality gameplay experience
Disclaimer: This is a satirical fan post. No actual update 3.0.3 exists... yet. Nintendo, please hire us. please hire us.