Performance Exhaust

Cat-back systems replace the parts after the catalytic converter. Many add valves that open to make the car louder on demand. Gains in power are often modest without engine tuning. Valved exhausts often have a quiet mode for early mornings or residential areas.

Larger pipes and less restrictive silencers let exhaust gases flow more freely.

Removing catalytic converters or particulate filters is illegal on road cars in most countries. Loud exhausts may fail noise limits at inspection or roadside checks.