Invidia HS15SW4GTP GT-Type Cat-Back for 15-21 Subaru WRX/STI

Vehicle Fitment

• 2015-2021 Subaru WRX & Subaru WRX STI (4-door sedan, AWD, 2.0L & 2.5L Turbo)

Features

• GT-Type high-flow cat-back exhaust system tuned for performance
• Mandrel-bent large-diameter stainless steel piping
• Dual exit configuration for balanced exhaust flow
• Polished stainless steel GT-type tips for a refined look
• Deeper, sportier exhaust tone without excessive drone
• Robot TIG-welded construction for strength and durability
• Improves throttle response and mid-range torque
• Direct bolt-on installation using factory hangers and mounts

Specifications

• Main piping diameter: approximately 76 mm (3")
• Tip diameter: polished stainless steel GT-type tips
• Material: SUS304 stainless steel
• Exit configuration: dual rear outlets
• Muffler type: GT-type tuned design
• Fitment: AWD Subaru WRX & WRX STI sedans

Included Components

• 1x Invidia GT-Type cat-back exhaust system (HS15SW4GTP)
• 2x Polished stainless steel GT-type exhaust tips
• Installation hardware (clamps, gaskets, brackets)

Product Description

The Invidia HS15SW4GTP GT-Type Cat-Back Exhaust is a performance exhaust upgrade engineered for 2015-2021 Subaru WRX and WRX STI sedans. Designed with larger mandrel-bent piping and a tuned GT-type muffler layout, this cat-back system enhances exhaust flow compared to the factory setup, helping improve throttle response and mid-range torque while delivering a deeper, more aggressive exhaust tone. The polished GT-type tips provide a refined exhaust outlet that complements a performance-oriented rear aesthetic.

Constructed from SUS304 stainless steel with precision TIG welding, the HS15SW4GTP is built for durability and long life. Installation is straightforward using existing factory hangers and hardware, making it ideal for enthusiasts seeking both improved performance and a more engaging exhaust note without complex modifications. Available for AWD WRX & WRX STI models with turbo engines, this cat-back is a solid upgrade for daily driving and spirited use alike.