[slrh22hatch]

I have an 03 SI and want to do some upgrades but nothing to drastic. I am new the K-Series and dont know to much about it. Are the cams, valves, valve springs, cams, intake manifold, throttle body, etc... interchangeable with the k20 in my hatch. Please help. It will be appreciated

 

[Rey]

k20a out of an integra R and the k20a3 out of the SI are almost the same. It's a complete swap with nothing speacial to do. Almost excatly like swapping an RSX-S engine in it. Go to k-series.com, or ephatch.com. There you can see motor swaps and stuff for the 03 civic SI.