92-95 civic si had 1.6 SOHC (D16) same motor as civic ex
99-00 civic si had 1.6 DOHC Vtec (B16A2)
02-05 civic si and base RSX have 2.0 DOHC i-vtec(K20A3) RSX has a different intake manifold. Is more like the GSR manifold.
Now the RSX type S has 2.0 DOHC i-vtec K20A2
The new civic si (07-09) has 2.0 DOHC i-vtec has K20something
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