You may not need everything but it's good to have!
90-93 Integra Rear Trailing Arms (with everything attached Rotor, Caliper, Ebrake Cables...)
or
90-91 CRX Rear Trailing Arms (with same...)
You can use either trailing arm but for CRX you need CRX ebrake cables and for Civic you need Integra ebrake cables (might as well get whole CRX trailing arm + cables for CRX, and whole Integra trailing arm + cables for Civic)
90-93 Integra "4040" Brake Proportioning Valve (Prop Valve), HIGHLY RECOMMENDED!!!