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November 13, 2025
If your WRX or STI has been feeling a little too polite on the road, the COBB Stainless Steel Cat-Back Exhaust is the kind of upgrade that wakes it up without turning your daily drive into a track day. It’s not shouting “race car only,” but it won’t hide in the background either. It just makes the car feel more alive, more connected, and way more fun to drive.
You bolt it on, hit the ignition, and suddenly your Subaru isn’t stock anymore. That deep, clean growl? Yeah, that’s real. The exhaust has the iconic boxer rumble everyone’s chasing, but without the obnoxious highway drone that makes your commute miserable.
The build is pure quality. Built with 304 stainless steel, TIG-welded, and mandrel-bent 3-inch piping keeps airflow smooth and unrestricted. Dual mufflers and quad polished tips nail that OEM-plus vibe: aggressive when you want it, refined when you don’t. And since it’s made specifically for 2011–2021 WRX/STI sedans, fitment is simple, no wrestling with weird hangers or “almost fits” moments. Clean, functional, and it just sounds right.
The first time you dip into the throttle, your car’s personality changes. Throttle response snaps to attention, the engine feels freer, and the rumble hits that sweet spot between aggressive and daily-drivable. Mid-range power suddenly feels alive, the exhaust flows smoother, and your Subaru finally sounds like it should without making you regret every highway mile.
If your ride already has a downpipe or heavy turbo upgrades, this cat-back will still make a difference, but expect a louder, more aggressive tone than stock, and the feel under throttle will shift too. As with any aftermarket exhaust, check your local emissions laws to avoid surprises.
This version is stainless steel, which strikes the perfect balance between weight, durability, and tone. If you’re chasing ultra-light performance, COBB’s titanium option exists, but it comes with a higher price tag and a slightly different sound. Most owners report minimal drone, but every setup and driver is different, so if cabin noise is a dealbreaker, take a few minutes to listen to clips from similar cars before committing.
For a cat-back that balances daily usability with actual, satisfying performance sound, the COBB Cat-Back is a no-brainer. It doesn’t overdo it, it won’t turn your commute into a track day, but it instantly makes the car feel sharper, more alive, and way more fun behind the wheel.
In the “drive smarter, not just louder” category, this one punches way above its weight while still giving you that boxer rumble and freed-up exhaust flow without making you regret hitting the gas on Monday morning.
