I have read in several magazines, websites, etc... that the 2.5 engine is not a good engine one is thinking of modifying it. I don't know about the 3.5 engines but I don't recall reading anything negative (yet) about that v6 engine. I have read that increase in pressure in the 2.5 engine can cause blown blocks and headers...that is.. even a small amount of pressure. Also the redline sucks due to bad valve spring. Did V6 owners hear anything negative about the v6 engine?