O' wise people of Honda-Tech, please could you shine your collective light of knowledge my way for a second?...thanks!

I have an K20a engine, and it is currently misfiring and popping and burping on idle. This comes after a 10lap race at the weekend. We noted what appeared to be the car suffering from fuel starvation on high speed right turns, after the race (on the warmdown lap actually).

A couple of my more mechanically minded friends suggested I could have leaned out the car with the way it was acting and as a result toasted the valves.

As the rules of the championship state I have to use OEM parts and I was looking for confirmation that the valves in a JDM K20A are the same as a K20a2 and K20a3 engine?
If they are not can someone out there help me find the part number I need for the Exhaust and Inlet valves please?!
I think they are
Inlet : 14711-PRB-A01
Exh' : 14721-PRB-A00

Until the engine is torn down this week we wont be sure but I would like to be able to click "order" asap when/if I do need the valves as I have the next race in 2 weeks.

here is a quick video of the problem.... www.youtube.com/BrYo0o49koY (skip to 35 seconds in to hear the issue).