I don't know who Corky Bell is but what I can tell you is that the car is sinificantly faster than it was before I put the manifolds on and it was fast then. I secretly didn't think it was going to be this significant...but it is! It's like having a normally aspirated V8 and a high rev. turbo car all in one. Greg called the car a "monster", my friend Mark Leader called it a "f...ing beast", I just call it ALOT of fun. Look at Seb's before and after results if you want hard data. But this was far and away the best upgrade I've ever done.