[Orange Blast]

To add a bit more to the porting information sharing. Here are
some pictures of those velocity stacks after the bottom is removed. This is where most of the casting flash is left behind on the sand casted intake.

These intakes are made from several Half's you might call them. The seams all come together at the bottom, on the inside of the intake. This leaves much to be desired in the flow of air to those runners.

The surface finish is the shape or roughness of the sand used to make the casting with.

An injection molded plastic intake would have been the best way to go. But its to costly for Ford to produce for such low manufacturing volume.

They have finally made that leap with the 05 GT.

I work on "Camry" intake molds every night at work and study the flow mechanics of it. While its not a hod rod car part, its quite a nice piece of work. All the runners are like an Extrude hone finish. And there are absolutely no obstructions in the air flow path like our Mach-1's.

As Nazman said, its not the velocity of the incoming air charge. Its the volume of air the intake is being choked out of.

By the way, Pauls high performance does both. Cuts open the intake, Extrude hones and then ports the rest by hand. $1,250 plus your core. Good luck with the grinding. And where your safety glasses at all times.