poor man's type r???

[speedminded]

But doesnt the p72 head have the flat edges on on the combustion chamber which reduced risk of detonation?

If the P72 combustion chamber is flatter and a few cc's smaller don't you think that would increase detonation?

As long as premium fuel is being used the chances of detonation on a stock GS-R/ITR is slim to none anyways.