Ill agree to disagree on this: You have a seized or hanging piston in a 4 piston, youll know. You will get a pull just by allowing the car to coast with no steering input, and especially when you apply the brake in the same mode...it'll pull. As for allowing it to damage the rotor, they have tattle tale tabs...There is nothing wrong with a single piston caliper, but the 4 piston provides better modulation, possibly more uniform pad life, and less maintenance at the cost of being more expensive to produce. Kind of like the shaft rockers to the stamped: They both do the job on a hydro, but one is far cheaper to produce with a minimum impact on performance, no brainer in the "nickle a unit" cost aspect. Either are 10X better than drums on the front. Both systems call out the same rotor runout .0025, but I believe the 4 piston actually has less drag potential as both sides recess .005 inches, while the unknown single piston design will probably recess the same amount but over both sides, so it will ride .0025 off the disc. As for more pedal travel for a 4 piston (.005 x 2 clearance), they may have a larger MC bore to begin with to negate that. Choose what you like.
