Basically, the P30 and the P28 are almost the same, but not really. Pretty sure any chip you could find for a P28, would work on a P30 in respects to the knock. I wouldn't worry so much about a "Spoon" chip, as finding a good chipped P28 for a B16A with the KS disabled, Kenji does them, he post on here, search for him, and email him.