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The Injen 3" cat‑back exhaust for 2016–2018 Ford Focus RS is a full mandrel‑bent 304 stainless system with dual high‑flow resonators and bolt‑on dual 4" black chrome tips. Hand TIG‑welded construction, CNC flanges and included exhaust-valve bypass module deliver a distinct sound and OE-style fitment with no cutting required. Dyno-proven gains up to +16 hp and +14 lb‑ft of torque are supported by the manufacturer.
Injen 16-18 Ford Focus RS 3in Cat-Back Stainless Steel Exhaust w/ 4in Black Chrome Tips
