My rear brakes drag really bad after a few minutes of spirited driving. They were smoking pretty bad on both sides, so I don't know what's up. I just did a rear disc conversion from an ex. I have a new master cylinder, 40/40 prop valve, new raybestos PG pads, new discs, ss lines. Calipers were used, but I don't see why both would drag. THere are no air bubbles in my lines either. It has never happened while driving regularly so I know it's because they got hot. Please help!!!!! Oh yeah, would cheap ass autozone discs cause this to happen? They were like 8 bucks a pop. I have brembo blanks here ready to go if those autozone ones are at fault. post edited for crappy description... Please help me so i don't have to get a new car with payments!!!