Invidia HS17CTRFGM3ST R400 Gemini Cat-Back Exhaust for 17-21 Honda Civic Type R

Vehicle Fitment

• 2017-2021 Honda Civic Type R (FK8, All Trims, 2.0L K20C1 Turbo)

Fitment Notes

• Includes front pipe -- connects from primary downpipe for a true full turbo-back system
• Triple-exit center configuration maintains OEM FK8 rear diffuser styling
• Full titanium version available: Invidia HS17CTRTG3ST
• Does not fit standard Civic models -- FK8 Type R only

Features

• Gemini R400 muffler -- 3 independent muffler resonators (one per tip) plus mid-pipe resonator
• Full 76mm (3") system from front pipe to tips -- true zero-restriction turbo-back
• Tuned between Q300 and N1 -- aggressive note with minimal cabin drone
• 1.5mm thick mandrel bent SUS304 stainless steel piping throughout
• CNC machined cast flanges -- leak-free, warp-resistant fitment
• Robot TIG welded construction
• Triple single-layer burnt titanium tips -- center exit
• Direct bolt-on -- exhaust hangers welded to OEM locations
• Improves throttle response, turbo spool, horsepower, and torque

Specifications

• Pipe material: SUS304 stainless steel, 1.5mm thick
• Pipe diameter: 76mm (3.0") full system
• Tip style: Single layer burnt titanium, slant cut, center exit
• Tip diameter: 101mm (4.0")
• Tip quantity: 3
• Muffler design: 3 independent resonators + 1 mid-pipe resonator
• Construction: Mandrel bent, CNC flanges, robot TIG welded
• Weight: 71.3 lbs
• Warranty: 1 year

Included Components

• Front pipe (downpipe to mid-pipe connection)
• Mid-pipe with resonator
• R400 Gemini muffler assembly
• 3x single-layer burnt titanium tips (101mm)
• All required gaskets and hardware

Product Description

The Invidia HS17CTRFGM3ST is the Gemini R400 full turbo-back exhaust system for the 2017-2021 Honda Civic Type R FK8. Unlike a standard cat-back, this system includes the front pipe that connects directly to the primary downpipe, creating a true full 76mm system with zero restriction from turbo to tips. The Gemini R400 muffler features three independent resonators -- one dedicated to each outlet -- plus a mid-pipe resonator, reducing system weight while producing a deep, individual exhaust tone for each exit.

The R400 sound profile sits between Invidia's Q300 and N1 lines: more aggressive than the Q300 with a pronounced note throughout the RPM range, but calibrated to minimize cabin resonance at highway speeds. 1.5mm SUS304 stainless steel piping, CNC machined flanges, and robot TIG welding provide a precise, leak-free installation at factory mounting points. Triple burnt titanium center-exit tips maintain the OEM FK8 rear diffuser aesthetic. Direct bolt-on installation -- no cutting or welding required.