I have a 2007 Tahoe Q7i with a 4.3MPI, I ordered the boat new in the fall of 2006 and talked myself into the 4.3MPI over the 5.0 or 5.7MPI's because gas was getting more expensive then... haha... well now that spendy gas is just the normal I thought about repowering with a 5.7MPI, but the cost...