A while ago some poeple on here told me that JDM P30 pistons will fit right and yield 11:1 comp. ratio on my b18b1. Today some friends told me that PR3 (Civic SI?) pistons would yield the same results? Is this true. A friend is selling them for $50 which I think is a good deal. Let me know if this will work or not so I can decide. Thanx.