The ornamental design for a multi-piston caliper, as shown and described.
FIG. 1 is a top, front, right perspective view of the multi-piston caliper, showing our new design.
FIG. 2 is a bottom, front, right perspective view thereof.
FIG. 3 is a front elevational view thereof.
FIG. 4 is a rear elevational view thereof.
FIG. 5 is a top plan view thereof.
FIG. 6 is a bottom plan view thereof.
FIG. 7 is a right side elevational view thereof.
FIG. 8 is a left side elevational view thereof; and,
FIG. 9 is a bottom, front right perspective view thereof in a state of use.
The broken lines illustrate portions of the multi-piston caliper that form no part of the claimed design. The broken lines illustrating the brake pads in FIG. 9 illustrate environmental structure that forms no part of the claimed design.