[Nevin]

On a car with mostly stock everything, I can't imagine much gains at all from something like this. It's a great idea to try to improve something, but this just isn't where improving needsto be done. The intake "region" of the car (besides the MAF anyway) is not something that really needs improvement.

The throttle body twin intake throttle plates are 60mm and capable of flowing 900 CFM*.
Our 202 CID engines can only flow 420 CFM at 100% volumetric efficiency
at 7200 RPM. That is from the FAQ page.

Besides, if you wanted itb's or anything like that, you'd need to run a standalone to make it work. If you're gong standalone, then I could imagine this being worthwhile, but until then, when you could actually tune FOR the changes, it would be quite hard to optimize your newfound power.

It SOUNDS like a fine idea, but there would be a lot of CAD time needed to design a manifold better than the manufacturer did. Ours is a design that is quite unique, and very effective at what it does. Being able to design something to "out do" it at the same power levels, same driveability, etc... would be very hard indeed.