Hondata

Hi, My car is 2003 CRV II with k20A4 engine, could anybody tell me what
the difference between k20a2,a3,a4; could a4 be modified more better?

I'm not sure exactly what the differences are, but the A2, A3, and A4 part of the engine code designate the head type. There are probably small [or not so small] differences in the heads.