I claim the ornamental design for a cylinder housing for air compressor, as shown and described.
FIG. 1 is a front/left-side/top perspective view of a cylinder housing for air compressor showing our new design;
FIG. 2 is a front-side elevational view thereof;
FIG. 3 is a rear-side elevational view thereof;
FIG. 4 is a left-side elevational view thereof;
FIG. 5 is a right-side elevational view thereof;
FIG. 6 is a top-side elevational view thereof; and,
FIG. 7 is a bottom-side elevational view thereof.
The broken lines in FIGS. 3 and 5 are included for the purpose of illustrating portions of the cylinder housing for air compressor that form no part of the claimed design.