Originally Posted by noid
How would this effect warranty? I have a certified pre owned 2007 that still is under warranty for another 3 and some years. Its also used as a family car, so how would gas mileage be effected?
Its hardly a nightmare when your paying a shop to do it for you, haha. Some people would like something unique/more powerful for the same price, some like the factory freshness of a 330i/335i/m3. I dont think one is better then the other, to each his own. As mark said there are plenty of reasons why one would own a 323i.
I was reffering to a potential buyer looking to purchase a stock 328i/330i not sawpped 323i/beafy motor. It would be a nightmare for a buyer, not you. Better pay more and sleep well.