Yea, I run at HRP, it is one of the faster tracks in the US, usually I cut 2.0-2.1 60 ft's, and run 14.0-14.1@98-99, but last Friday I was cutting really good 60's, they had resurfaced the track, that may have been a factor, my next mod will be a timing adjuster and to bump my timing to 15* and see what I can get from that, this chip I have claims to bump my total timing 4-6*, so it may ping at 15*, but it would be sweet if it did not, if it does I will back off untill it runs without any problems, I am hoping I can get it to at least 13*. They just started coming out with upper Intake's for the 4.6L, not that many people have them, but if they seem to make decent gains I may look into that as well, with those two mods and a set of 4.10's, I can see myself running 13.5's@100+. But the mod I need most is Longtubes, that s the best proven mod for the 4.6 as of now, just to damn hard to install.