Originally Posted by Team Plutonium
I know I'm nitpicking now... but anyway, the 'not-voiding-OEM-products' really depends on the dealership. Dinan does not have an official partnership with BMW outside the motor-sport scene. Most dealers will work with you, and have no issues with Dinan, but it is always better to check with your service manager. I've seen issues were Dinan was blaming OEM parts, and the dealership blaming Dinan in return... this can cause quite a circle jerk.
My rule of thumb is always: When you start modding - never assume you have any kind of warranty.
Now I see how you reached over 8000 posts. Having the last word really adds up