How can you visually tell the difference between a 454 MPI and a 454 MAG MPI

intake manifold is different.. pretty easy to tell

Not to be a jerk, but right now you have 3 open threads about the same thing... Granted the one is more about the boat... So having two threads about the same question (Motor) will usually result in less useful information as people will be answering questions that have already been answered in the previous thread.. Just sayin.. Good luck with your search.

http://www.offshoreonly.com/forums/g...4-mag-mpi.html
http://www.offshoreonly.com/forums/g...orsepower.html
http://www.offshoreonly.com/forums/g...-purchase.html

I do have the serial # off the engine now "OL068124. Thanks for the help