now are u putting a jdm sir2 or gonna put a 99-00 usdm civic si? Ur best bet would be to get the third gen b16a, or get a b16b just try to get a motor in the same year as the vehicle if u want a easy swap, since the ur civic is obd2. Also try to get it as a COMPLETE swap with mounts, linkage, tranny, ect ect itll save u from a big ass headache. but thats the my .02