I had Bob Kurgan do the tuning. He was very helpful and I'd recommend him to anyone.
2003 Cobra convertible, 20,500 miles, mods: 2.93 Billetflow Upper, JLT RAI, Flowmaster catback. And makings of some belt slip in high rpms.
455/465
Myspace video with my video camera:
http://myspacetv.com/index.cfm?fuseaction=vids.individual&videoid=31060876
My cobra did the SAME exact little dips at the top of the rev range. My tuner and I both thought it was belt slip too, but it turned out to be the COT (cat over temp) thing in the tune was not disabled and it was throwing fuel in at the upper revs to keep the cats cool. Im sure bob disabled that, but it doesnt hurt to check it out. I have heard of a few other cobras doing that same thing if that COT thing is not disabled in the tune.