Yes, only beneficial with more serious mods and higher redline, if you read my first post, I explained most of the tests performed..
Here's more Dynographs...
This is the latest one from Havoc's Dyno Day last month..
http://img.photobucket.com/albums/v1...0/146Webii.jpg
Old graph... Showing stock output from many years ago...
http://img.photobucket.com/albums/v1...Dyno_Webii.jpg