Incremental gains that stack well with other bolt-on mods
Improved exhaust flow and aggressive exhaust note
Cat-back systems are 50-state legal since they're behind the catalytic converters
Moderate install — doable in a home garage with some mechanical experience

Things to Know

Sound level varies by brand — some are very loud, others more refined

What Does This Do?

Flowmaster is the classic American muscle car exhaust brand. The Outlaw series uses their chambered muffler design for that deep, throaty V8 rumble that Flowmasters are famous for — it's a distinctly different sound from the smooth tone of Borla or Corsa. Benefits: aggressive muscle car sound at a reasonable price (one of the cheapest cat-backs available), lifetime warranty, mandrel-bent stainless steel for good flow, and the Outlaw is their loudest option. Trade-offs: there WILL be drone at highway cruise speeds. Flowmaster's chambered design creates a resonance between 1,800-2,500 RPM that you'll hear constantly on the freeway. Some people love it, others find it exhausting on long drives. The sound is also 'raspier' than Borla's smooth note — it's a matter of taste. If you want the classic American muscle exhaust sound and don't mind the drone, this is the best value. If drone is a dealbreaker, spend more for Corsa (RSC technology eliminates it) or AWE Touring.

Technical Details

Aggressive muscle car sound with Flowmaster's signature deep tone. Mandrel-bent stainless steel tubing. Black coated stainless tips.

Compatibility Conflicts

Borla S-Type Axle-Back Exhaust

A cat-back exhaust replaces everything from the catalytic converters back, which includes the section an axle-back replaces. You only need one or the other.

Flowmaster Axle-Back Exhaust with Black Tips

A cat-back exhaust replaces everything from the catalytic converters back, which includes the section an axle-back replaces. You only need one or the other.