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The Remark R1 Spec full-titanium cat-back exhaust for 2015–2021 Subaru WRX STI offers a single-exit layout in a lightweight construction that replaces the factory cat-back system. Intended as a direct replacement, it provides a different exhaust character and reduced mass through titanium construction. This system is supplied as a full cat-back for applications matching the listed model years.
Remark 15-21 Subaru WRX STI R1 Spec Cat-Back Exhaust Single Exit - Full Titanium
