I don't know that I've seen anyone post one way or the other on this. It seems like the greatest risk is if it is not installed properly, leaks and then damages the engine, they may not honor the warranty due to the modification. I just received a letter from KIA today extending the warranty on an oil leak from the oil filter housing. It extends the warranty from 5 years/60,000 miles to 15 years/150,000 miles for repairs related to an engine oil leak from the oil filter housing gasket.