Forget that crap.
Those things are supposed to basically create smooth vortices to put the air into the head more smoothly. BUT, our intake manifolds are so *****ed up that it can't/won't help at all.
Seriously, if you REALLY want to try something like that, find a local machine shop and give them the specs you want them to match. But I wouldn't bother.
Stick with the SCT, it's the bomb-diggety.