Invidia HS11STIGM4ST Gemini R400 Quad Ti Tip Catback Exhaust for 2011-14 Subaru

Vehicle Fitment

• 2011-2014 Subaru WRX / WRX STI (Turbo EJ25, AWD) - 4-door sedan only; 2015+ and hatchback not supported.

Features

• Invidia Gemini R400 performance cat-back exhaust engineered for freer flow and aggressive sound
• Mandrel-bent SUS304 stainless steel piping for reduced back pressure and stronger torque
• Minimal exhaust bends promote high-speed flow and throttle response
• Quad straight titanium exhaust tips for standout rear styling and lightweight durability
• CNC-machined flanges and robot TIG welding for durable, leak-free joints
• Tuned muffler design that sits between Q300 and N1 in tone and performance
• Direct bolt-on installation with OEM hanger compatibility
• Produces a deep, sporty boxer sound with improved power delivery

Specifications

• Part Number: HS11STIGM4ST
• Series: Invidia Gemini R400
• Material: Mandrel-bent SUS304 stainless steel
• Piping Diameter: 76 mm (3")
• Exhaust Tip Diameter: ~101 mm quad straight titanium-colored tips
• Exit Configuration: Quad rear exit
• Fitment: 2011-2014 Subaru WRX / STI sedan (AWD, Turbo EDJ25)
• Installation: Direct bolt-on using included hardware

Included Components

• 1x Invidia Gemini R400 cat-back exhaust assembly (HS11STIGM4ST)
• 4x Titanium colored straight exhaust tips
• 1x Set of gaskets
• 1x Hardware kit

Product Description

The Invidia HS11STIGM4ST Gemini R400 Quad Titanium Tip Cat-Back Exhaust is a high-flow exhaust upgrade designed specifically for 2011-2014 Subaru WRX and WRX STI sedans. Built with mandrel-bent SUS304 stainless steel and precision CNC-machined flanges, the Gemini R400 system minimizes back pressure to support stronger throttle response and improved torque over the stock exhaust. Its tuned muffler design produces a rich, aggressive boxer engine tone that sits between Invidia's more reserved Q300 and louder N1 systems, giving enthusiasts a balanced performance sound.

Featuring quad straight titanium-colored tips, this exhaust system enhances rear aesthetics while offering long-lasting corrosion resistance. Installation is direct bolt-on using OEM hangers and included hardware, making it straightforward for experienced installers and performance builders. Tailored for AWD turbocharged WRX and STI sedans, the HS11STIGM4ST delivers a distinctive sound and performance upgrade for street and track-oriented Subaru builds. The system does not fit hatchback body styles or model years beyond 2014.