Cobb 11-21 Subaru WRX/STI GV/VA Sedan Catback Exhaust

If you're looking to give your 2011-2021 Subaru WRX or STI sedan a more aggressive sound and improved exhaust flow, this COBB catback exhaust system is a solid choice. It's designed to replace the factory muffler and piping from the catalytic converter back, letting your engine breathe a little easier and produce a deeper, more satisfying tone. This isn't just about sound, though; a less restrictive exhaust can also help your engine perform a bit better.

COBB built this system using 3-inch diameter, mandrel-bent 304 stainless steel tubing. Mandrel bending means the pipe keeps its full diameter through the bends, which is key for smooth exhaust gas flow. The 304 stainless steel is chosen for its strength and resistance to corrosion, so it should hold up well over time, even with road salt and moisture. The system features dual mufflers and polished 4-inch exhaust tips, giving your WRX/STI a more substantial look from the rear. Everything you need for installation is included, typically meaning the exhaust sections, hangers, clamps, and any necessary hardware, making it a direct bolt-on affair without needing to cut or weld.

When installing a catback exhaust, you'll generally notice a more pronounced exhaust note, especially under acceleration. It's a popular modification for WRX/STI owners who want to hear more of their car's boxer engine rumble. Make sure to check your local emissions regulations, as modifying the exhaust can affect emissions compliance in some areas.