I'm all for new products and people taking initative, but two questions;
1) Are you going to put velocity stacks on the the top of each runner in the main plenum? If not, top end will suffer.
2) Plan on dyno tuning runner length?

As for price;
For less than $200 a ported manifold can be purchase that gives 10wHP.

Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST Pre98 Zetec - Some Mods