Hey,

Yes, I have heard of using ITR calipers on OEM 242mm knuckles with 262mm rotors.

You will need new rotors and ITR calipers.

Legend double piston calipers might fit, but I don't see the advantage over ITR calipers. Look better though.

Will need to shave the inside diameter of the caliper/pad to clear the rotor.

IMHO, it's preferable to get the OEM 262mm knuckle, rotor and caliper.

PM me later and I'll dig up a few threads on honda-tech.com with guides on what brake upgrades are available (at least for civics).

Fastbrakes.com sell some Honda brake upgrades. Brian Hasty is very helpful with advice. Shipping rotors is gonna be expensive, better get them locally.

Upgrading your rotors probably won't improve your braking distances.
Thermal capacity will go up, but this is only useful at the track.

Nick.