Although it sounds like something I’d watch other people attempt it’s not rational or cost effective idea. Just buy a 4.8is it’s same body with light touches. І взагалі цей проект хіба що на YouTube для просмотрів. I had a 4.6is and my cousin had 4.4i and it wasn’t a big enough difference to warrant this undertaking. Just my humble 0.02 cents.

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2002 BMW X5 4.6is