It took a little while, but I found this page on the Banks site. It's a comparison between stock and aftermarket performance, but think this will provide you with the info what you're looking for:
<a target="_blank" href=http://www.truckpower.com/test_results_AC01.cfm>6.5 HP/Torque Charts</a>
Hope this helps you out, brother!!!/forums/images/icons/smile.gif