Buy OEM 2018 Subaru Part # 44651AF96A. Catalytic Converter Heat Shield. Converter Pipe. Cover Complete Exhaust (Left, Front, Upper). Exhaust Manifold Heat Shield A tinny

Heat Shield used on the Catalytic Converter.

COVER COMPLETE-CONVERTER PIPE,FR UPR LH Catalytic Converter Heat Shield

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Exhaust Manifold Heat Shield
A tinny ticking, buzzing, or rattling noise that sounds like it's coming from under your 2018 Subaru may be a bent or rusted exhaust heat shield.