Invidia HS15STIG3S Q300 Cat-Back Exhaust System Stainless 15-21 Subaru 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, 2.5L Turbocharged H4, AWD)

Features

• 76mm (3.0") mandrel-bent piping for optimal exhaust flow
• Quad 110mm (4.33") rolled stainless steel tips for a polished appearance
• Constructed from high-quality SUS304 stainless steel for durability
• Flat-bottom muffler design enhances high-speed aerodynamic performance
• Continuous piping design reduces back pressure and improves performance
• Dual resonated mufflers provide a deep, refined exhaust note
• Robot TIG welding ensures consistent and strong welds
• Direct bolt-on installation with included hardware and gaskets

Specifications

• Material: SUS304 stainless steel
• Pipe Diameter: 76mm (3.0")
• Tip Diameter: 110mm (4.33")
• Tip Material: Stainless steel
• Tip Finish: Polished
• 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 Q300 Cat-Back Exhaust System (HS15STIG3S)
• 1x Set of gaskets
• 1x Set of mounting hardware

Product Description

The Invidia HS15STIG3S Q300 Cat-Back Exhaust System is engineered to enhance the performance and sound of the 2015-2021 Subaru WRX and WRX STI sedans. Featuring 76mm mandrel-bent piping and quad 110mm rolled stainless steel tips, this system offers improved exhaust flow and a refined, deep exhaust note that complements the vehicle's turbocharged engine.

Constructed from high-quality SUS304 stainless steel, the Q300 system is designed for durability and corrosion resistance. The flat-bottom muffler design not only contributes to aerodynamic efficiency but also houses a continuous piping layout that reduces back pressure, resulting in increased horsepower and torque. 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.