Invidia HS08SW4GT3 Q300 Cat-Back Exhaust w/ Stainless Tips for 08-14 Subaru STI

Vehicle Fitment

• 2008-2014 Subaru WRX Sedan (AWD, 2.5L Turbo)
• 2009-2014 Subaru Forester XT (AWD, 2.5L Turbo)

Features

• Mandrel-bent SUS304 stainless steel piping for improved flow
• Q300 series muffler with flat-bottom design for balanced tone
• Dual polished rolled stainless steel exhaust tips (~110 mm)
• Enhanced throttle response and reduced back pressure
• Deeper, sporty yet manageable exhaust note
• Direct bolt-on design using OEM hanger locations
• Precision CNC-machined flanges for secure fitment
• Robot TIG-welded construction for durability and corrosion resistance

Specifications

• Part Number: HS08SW4GT3
• Type: Q300 Series Cat-Back Exhaust System
• Material: SUS304 Stainless Steel
• Piping Diameter: ~76 mm (~3")
• Tip Diameter: ~110 mm (~4.33")
• Exit Configuration: Dual rear outlets
• Fitment: AWD Subaru WRX • AWD Subaru Forester XT

Included Components

• 1x Q300 cat-back exhaust assembly
• 2x Polished rolled stainless steel exhaust tips
• 1x Hardware kit (bolts, clamps, gaskets)
• 1x Installation instructions

Product Description

The Invidia HS08SW4GT3 Q300 Cat-Back Exhaust is a performance-enhancing exhaust system tailored for AWD turbocharged Subaru models including the WRX Sedan (2008-2014) and Forester XT (2009-2014). Built from premium SUS304 stainless steel with mandrel-bent piping, the Q300 muffler's flat-bottom design and polished rolled tips help optimize exhaust flow while delivering a refined, sporty sound that enhances engine character without excessive cabin drone.

This exhaust system replaces your stock exhaust from the catalytic converter rearward with a direct bolt-on fit that uses factory mounting points for ease of installation. The Q300 design strikes a balance between performance and daily drivability, providing improved throttle response, reduced back pressure, and visual upgrades at the rear of your vehicle. Durable construction with precise CNC machined flanges and TIG-welded joints ensures long-lasting reliability for street or enthusiast driving.