Invidia [17-21 Civic Si] Gemini Cat-Back Exhaust - Triple Titanium Tips
The Invidia Gemini Cat-Back Exhaust for the 2017-2021 Honda Civic Si Sedan brings race-inspired sound and presence to the 1.5L turbocharged Si. Built around 3-inch (76mm) mandrel-bent stainless steel tubing that connects all the way to the primary downpipe, the system features a built-in resonator in the mid pipe and Invidia's triple burnt titanium tip exit (4"/4.5"/4") for an unmistakable rear-end look. Increased piping diameter and smooth bends improve throttle response, horsepower, and torque, while hangers welded onto the OEM locations make installation a direct bolt-on.
- 2017-2021 Honda Civic Si Sedan (1.5L turbo; sedan only)
- 3" (76mm) inner diameter mandrel-bent stainless steel tubing, connecting to the primary downpipe
- Triple burnt titanium tips (4" / 4.5" / 4")
- Built-in resonator in the mid pipe
- Hangers welded onto OEM locations for direct fitment; hardware included
- Part HS17CS47GM3ST
Products received may vary slightly from images due to manufacturing tolerances or supply chain variables.
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