I would not be afraid of losing my warranty with a K&N intake. Not one tiny bit.
To bey honest, my is tuned with full bolt ons and I've never been denied warranty work. I've always been upfront with my dealership about all my mods. My car is also 4 years old, and I just recently had some parts replaced under my power train warranty.
But I go to a dealership that treats their customers right. But if my transmission fell out of my car because I was racing at the track, I wouldn't expect GM to pay for it.
2010 Camaro 2SS/RS, L99 A6
Bolt ons (12.10 @ 113.60 mph, 1.77 sec 60')