Invidia HS17CS27GM3ST Gemini Triple Ti Tip Cat-Back for 17-21 Honda Civic Si

Vehicle Fitment

• 2017-2021 Honda Civic Si Coupe (2.0L DOHC Turbo, FWD)

Features

• Full Gemini Series cat-back exhaust system
• Mandrel-bent large diameter stainless steel piping
• Triple burnt titanium exhaust tips for premium style
• Optimized muffler design for increased flow and sound
• Reduced back pressure for improved throttle response
• Enhances horsepower and torque potential
• Aggressive exhaust note while retaining street usability
• Direct bolt-on installation using factory hangers

Specifications

• Part number: HS17CS27GM3ST
• Material: SUS304 stainless steel main piping
• Piping inner diameter: ~70 mm
• Tip material: Titanium with burnt finish
• Exhaust tip diameters: ~101 mm (multiple)
• Exit configuration: Triple rear outlets
• Fitment: FWD Honda Civic Si Coupe

Included Components

• 1x Invidia Gemini triple titanium tip cat-back exhaust
• Mounting hardware (clamps, brackets, gaskets)

Product Description

The Invidia HS17CS27GM3ST Gemini Triple Titanium Tip Cat-Back Exhaust is a high-performance exhaust upgrade designed exclusively for 2017-2021 Honda Civic Si coupes equipped with the 2.0L turbocharged engine. Constructed from quality SUS304 stainless steel with mandrel-bent piping for smooth exhaust flow, this cat-back system reduces back pressure compared to the factory setup, helping to improve throttle response and power delivery. The distinctive triple burnt titanium tips provide a premium visual upgrade while complementing the aggressive exhaust tone.

Engineered as a direct bolt-on replacement, the Gemini exhaust installs easily using the vehicle's existing hangers and mounting hardware. It's crafted to enhance horsepower, torque potential, and mid-range performance while delivering a deep, sporty note that appeals to enthusiasts. With a balance between performance gains and everyday usability, this exhaust system makes a strong upgrade choice for Honda Civic Si owners seeking both sound and performance enhancements.