i plan on trying to get '91 4 piston capilars and rotors in place of my '89 single piston capilars. has anyone tried this? it should fit, is there anything special i shoud know? thanks...

 

I've done it, and yes its a direct bolt on. Its pretty straightforward. I think I took some digi-pics, but not very many or very detailed. PM me if you want to see them. The hardest part was getting the damn phillips screws holding the front rotors on out. I used an impact tool with a rubber mallet to get them out and that worked pretty good. If the rotors your putting in are used, might as well have them turned before you install them, its only like $10/piece if they are already removed from your car. And if your old rotors are still within spec, have them turned and sell'em. Be careful to not strip the brake line fitting where it connects to the line that comes through the fender from the Masterbrake Cylinder. I ended up using a robo-grip after sorta stripping mine. Also I don't know if this will be the same on your car as on mine, but the line that connected the single piston caliper on one end, and the line off the MBC on the other end, was rubber. The male end of it was longer than the female side on the 4-piston caliper, so it won't thread all the way in. If this is the case make sure you tighten it as much as possible without breaking anything or brake-fluid will leak right there. Trust me, I know. The line that is supposed to connect to the 4-piston caliper is metal, like the line coming off the MBC. I found a parts car, and snagged that metal brake line part off it. I don't know if this will be the same for you. Good luck.

 

thanks very very much... they will be goin on sunday!!