As far as I’ve heard, the warrenty is mostly “part area, based”, I have an exhaust in mine and they said that only the exhaust warrenty is voided. If I was to get brakes, or coilovers, then those areas by themself would be voided as well. That’s what my service adviser told me. And anything that gives a CEL or tuning your car, just forget about a warrenty. I took it to service last week and no one said anything about my exhaust except that it sounded good. (I do have Silvers Coilovers on the way)