Look closely at the picture of the Wilson ported M1 4500 and you'll see that the logo says Mopa. Wilson added a lot of material to the outside of the runners so they could port the inside of the runners. The outside of the runners in that picture is not stock cast aluminum. It is welded aluminum that has been blasted to look like it was cast. There is a lot going on with that intake that you can't see unless you look closely.

Once you spend a ton of money on that intake it works fantastic. I'm not sure where that intake is these days. I think I sold it to someone here on Moparts for pennies on the dollar. Hopefully they're enjoying it.