no, you have to start with 100% chance of non piston retraction...even with the single piston version you still have a 100% chance of trouble. At any rate, doesn't matter because I do have a single piston Girling caliper system and I am impressed. My question would then become... why would these sites sell 4 piston fixed caliper units for my 1990 300TE to the tune of $6-700? Yeah, I knew it was goofy, I seldom track the station wagon.
But when I take up to it up to Road America I insist upon 4 piston calipers....