Invidia HS15STIGM4ST R400 Cat-Back Exhaust Quad Titanium 2015-2021Subaru WRX/STI

Vehicle Fitment

• 2015-2021 Subaru WRX (Base, Premium, Limited; 2.0L Turbocharged H4, AWD)
• 2015-2021 Subaru WRX STI (Base, Limited, Series.HyperBlue, Series.Gray; 2.5L Turbocharged H4, AWD)

Features

• 3.0" (76mm) mandrel-bent piping for optimal exhaust flow
• Quad 4.0" (101mm) single-layer titanium tips for a distinctive appearance
• Constructed from high-quality SUS304 stainless steel for durability
• Designed to produce a deep, aggressive exhaust note without excessive cabin drone
• Optimized for reduced back pressure and improved throttle response
• Direct bolt-on installation utilizing factory mounting points
• Includes all necessary gaskets and hardware for installation
• Engineered to enhance both performance and aesthetics

Specifications

• Material: SUS304 stainless steel
• Pipe Diameter: 3.0" (76mm)
• Tip Diameter: 4.0" (101mm)
• Tip Material: Titanium
• Tip Finish: Burnt
• Exit Configuration: Quad rear exit
• Drivetrain Compatibility: AWD
• Engine Compatibility: 2.0L Turbocharged H4 (WRX), 2.5L Turbocharged H4 (WRX STI)

Included Components

• 1x Invidia Gemini R400 Cat-Back Exhaust System (HS15STIGM4ST)
• 1x Set of gaskets
• 1x Set of mounting hardware

Product Description

The Invidia HS15STIGM4ST Gemini R400 Cat-Back Exhaust System is engineered to elevate the performance and sound of your 2015-2021 Subaru WRX or WRX STI. Featuring 3.0" mandrel-bent piping and quad 4.0" single-layer titanium tips, this system offers improved exhaust flow and a bold, aggressive exhaust note that enhances the driving experience.

Constructed from high-quality SUS304 stainless steel, the R400 system is designed for durability and corrosion resistance. The system is optimized to reduce back pressure, resulting in increased horsepower and torque, as well as improved throttle response. Installation is straightforward, with all necessary gaskets and hardware included for a direct bolt-on fit. This exhaust system is compatible with both the 2.0L WRX and the 2.5L WRX STI models, providing a performance upgrade that maintains daily drivability.