Im thinking of doing a B20 Vtec in the near future (if I ever get a job ). But anyway, Ive been doing alot of research regarding the whole swap. I know the factory crompression ratio of the CRV is 8.8:1... what I was wondering is if B-series pistons are interchangable. I was thinking of putting my P72 pistons on there with the B20 rods, but then I remembered that the B20 sits at a 2.0 while the GSR is a 1.8, will this matter?? Does the 2.0 mean that the piston are wider?? I dont beleive that they are interchangable, but I still havent really found out.