I need a left caliper for a SE rear end. I found one on ebay, but it is listed as 84-85 caliper. Are they rear calipers the same for 84/ 85? I have also noticed on here some brakes have the banjo style brake lines? What year are those 2?

 

The Se and GSL are different calipers.

 

are they both a single piston? how can you tell the difference?

 

They are both single piston, but the SE has vented rear rotors so the SE calipers are wider to accomodate them. I believe both have the same style brake hose. Second gen's have the banjo fitting on their rear brakes, I don't think the GSL-SE shouldn't though.