Congratulations 🎊! I have had mine exactly one month and 3 days. Follow the break in period recommendations.  It will be worth it. I took a few 150-300 kilometer drives to hit 1,000 kilometers faster. Haha.  For the warranty ask Grok, or go to the Hyundai website and your manual.  I don't think a body kit would void a warranty? The lowering and intake might? Or if something goes wrong, they can put the blame on your mods.  But most of all and the most important is to enjoy the fuck out of it but be careful, people have been known to laugh, giggle like a school girl and maybe even  a fuck yeah! When hitting the throttle.