COBB SUBARU SS 3" CAT-BACK EXHAUST WRX 2015-2021, STI 2015-2021

Enhance the sound, flow, and visual appeal of your 2015–2021 Subaru WRX or STI with the COBB 3" Stainless Steel Cat-Back Exhaust System—engineered for enthusiasts who demand premium materials, precision fitment, and a refined, aggressive exhaust note.

Constructed entirely from 304 stainless steel, this cat-back system offers long-term corrosion resistance and durability under extreme driving conditions. Every piece of the system is CNC mandrel bent to maintain consistent diameter and maximize exhaust flow. The TIG welds are not only structurally strong but add a show-quality finish that reflects COBB’s industry-leading craftsmanship.

At the rear, four laser-etched 3.5" polished double-wall tips fill the factory bumper cutouts perfectly, giving the car an aggressive, symmetrical appearance. The COBB logos etched into each tip complete the look with subtle branding that stands out.

Designed to work with both the factory downpipe and the COBB 3" stainless steel downpipe, this cat-back is a true bolt-on solution that provides a smooth, deep tone without excessive drone. Whether you're daily driving or hitting the track, this system delivers noticeable performance improvements and that unmistakable COBB exhaust presence.

Best of all, it’s fully compatible with COBB Off The Shelf (OTS) maps, making it easy to unlock its full potential when paired with an Accessport.