Interchangablity between B16a2 and B18c1

[1/4Mile]

it will work if you change the oil pump and water pump, but I suggest just getting a new timing belt for the gsr.

Thanks , but whywould you saythat if the B16 Greddy extreme timing is new and the water pump is new. The oil pump for all b-series on 92-up is the same 15100-p72-A01
B16a2,3, B18c1, and B18c5