Originally Posted by theDreamer

Jwick is correct, a good dealer will warranty work which does not directly related to what mods you did.
Heck, even some will do some warranty or repair work because they put the best tech on it and get to charge the "premium" price. Now, this does not mean they can charge extra just because it is modded. It just means you are not having the oil change guy who bills out $25 an hour rate working on the car.

Also, mine goes to a dealer and they are fine with it (they are the ones who did the install).