The replacement caliper SHOULD have the same working dimensions of the original equipment. I had a piston get stuck on my old Toyota Pickup truck with 150,000 miles on it. I only replaced that one caliper with a remanufactured part that had the exact same dimensions. The other side I kept. It lasted until I lost the truck in an accident with 325,000 miles on it. Any replacement part SHOULD meet the OEM design unless you’re upgrading to a high-performance set of brake calipers with a different design than OEM. At that point., all bets are off.