I recently installed jdm ef9 rear disc brakes and goodrige steel braded lines i flushed and bleed the system severl times going in order rr, lf, lr, rf. i alsoinstalled the proportioning valve it came with. the brakes still feel a little mushy compared to my friends eg with steel lines. any answers or suggestions would be greatl appretiated. oh ya i also its a 1991 civic si and has DA front brakes.

 

if it is mushy, then sounds like you still have air in the lines and have more bleeding to do.