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b16a proforms EXTREMELY well in a CRX personally i do not like H22a or K20 motors in civics i dunno i really do like the b16a in CRX though my friend has one in his SI CRX THAT THING HAULS ***!!
i think you mean a k20. and k is too expensive just get the b18c5 i just swapped the c5 and am very happy. besides the 5 speed and not 6 theb18 is better than the k20. IMO