I recently installed some Arias 9 to 1 compression pistons, InlinePro blockguard, new OEM headgasket, and a new Action Clutch into my '01 ITR motor. I'm basically running it N/A right now for break in purposes and while I await my new injectors and Hondata.

Everything is running well and after about 1000 babied miles on the new pistons and clutch I decided to make my 1st WOT redline run. It pulled pretty well, and VTEC seemed to activate normally. But at around 7500 RPM's it seems to kind of "hiccup" or slightly bog down. It wants to then go ahead and continue pulling to redline after that normally.

Any clue what the issue is? FWIW, the timing is retarded about 4 degrees if that would make any difference. I also have a fresh valve adjustment, and no check engine lights.
Thanks for any info or idea on what the issue may be.
Mark