dude seriously i have a rear disc brake i got off an integ and im gonna install it onto my 91 civic hatch too and it should fit properly if installed right.haha but any ways man check to see if it mounts on right,check if you have to modify something to make it and if it will affect the way you drive it man.if it fits on properly and installs well, get a rear sway bar off an si and you should be running smooth