Preheat grill to medium-high (about 450°F). Place corn on grill grate; grill, uncovered, 15 minutes or until husks are charred and corn is tender.
Remove corn from grill; let stand 10 minutes. Pull husks back; discard silks. Brush corn with oil. Sprinkle with cilantro, chile powder, and salt. Serve with lime wedges.
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