so i was looking up honda part numbers and came across something kinda weird/odd. . . i thought that the b series water pumps where the same with the exception of the ls. i found 2 different part numbers for the gsr: 94-95: 19200-P72-003 ( gsr only) 96+: 19200-P72-013 ( gsr/itr ) this is where im confused, because can u use an itr water pump on a b16 and such? i have a 94 or 95 gsr bottom end and wanted to put an itr water pump on it. i figured they were the same part number since the bottom ends are almost identical. if someone could clear this up, it would be awesome. does the itr flow more? because i think the fitment is the same for both of them.