I saw that one of my videos have been posted here on installing a rear diffuser. I also made a DIY for installing a front lip. Hope it helps.
Any eBay lip will serve its purpose. Just be careful going up driveways. Even if your cars not lowered, it still has a tendency of scraping if you;re not careful.
https://rover.ebay.com/rover/0/0/0?m...2F153649401742
Feel free to message me with questions!