k20z3 is a good motor its also in the acura csx (canadian) which looks like the american civic si sedan,
http://upload.wikimedia.org/wikipedia/commons/4/4e/%2707_Acura_CSX_Type-S.JPG
K20Z3
This inline-4 cylinder internal combustion engine is found in the US market Honda Civic Si (2006+) & Canadian market Acura CSX Type-S. It has an aluminium block with an aluminium head, and a bore and stroke of 86 mm x 86 mm, resulting in a 2.0 Liter displacement.
* Found in:
o 2006-2008 Honda Civic Si (FG2 - Coupe & FA5 - Sedan), 2007 Acura CSX Type-S
+ Displacement : 1,998 cc (121.9 cu in)
+ Compression : 11.0:1
+ Power: 197 bhp (147 kW) @ 7800 rpm (sae NET Rev 8/04)
+ Torque: 139 ft·lbf (189 N·m) @ 6200 rpm (sae NET Rev 8/04)
+ Redline: 8000 rpm
+ i-VTEC Engagement Window:5800 RPM