There's no tornado effect. The outer tubing produces soundwaves from incoming air which help "push" it into the manifold. The V2's are dyno proven to provide like 3-4 horsepower over the old aem's
on a 2000 DX so they must be worth something on a ballsy n/a setup. Go to
www.google.com and type in aem v2 and you'll find more info than you ever wanted to know on them.