I don't know about the IT regs, but 89-91 Civic Si's came with rear disc brakes, just like the CRX's.

-Jayson
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I am 99.9999% sure you are incorrect about this. I was a Honda dork before I became a Mazda dork, and the only EF ('88-'91) that came with rear discs was the '90-'91 CRX Si. I know for a fact that '88-'89 Civic Si's had drums, as I have had an '89. I have NEVER seen any EF Honda with discs that wasn't a '90-'91 CRX Si.

I'm off to research to make sure.

If I am not mistaken I believe my car has drums, but I will double check tonight. I will also try to post some pictures this weekend if I get a chance. How difficult is it to remove the dash in a civic? We are going to be rebuilding part of the roll cage and adding a bar inside the dash that will connect both front down tubes on the cage, so the dash will have to come out. On the roll cage there are some stickers, I assume inspection stickers, do these have to stay on the cage? I will also be adding some additional bracing on the cage. One area that needs a reinforcing bar is from the roof halo to the main roll bar and it will attach where the stickers are located. We will also be repainting the interior and cage so I need to remove them for that as well. Can someone help me out here?
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The stickers are just event techs, they can come off. The dash on a Civic is a straightforward removal, just like any other car, unless the cage is in the way, then it gets a little more awkward. While the dash is out, if I were you I would seriously consider adding the two allowed braces between the A-Pillar down bar and the firewall as your 7th and 8th points. Extra foot protection is a good thing, and any competent cage guy can knock that job out in no time, so it shouldn't cost much.