The Borla S-Type cat-back exhaust system fits the 2015-2020 Audi S3. It replaces the exhaust from the catalytic converter back, uses 3-inch diameter piping, delivers the classic S-Type sound with no drone inside the vehicle, and ends in 3.5-inch polished T-304 stainless steel tips.

Part number: 140631

Borla cat-back exhaust system.

This BORLA® Cat-Back system was designed specifically for the Audi 2.0L turbo engine. Do not use the adapter for full 3” inlet. The system has functioning valves. It delivers the classic S-Type sound with no drone inside the vehicle. Add optional resonator 60707 for additional sound control. BORLA® Cat-Back and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit.

A cat-back system replaces everything behind the catalytic converter and leaves emissions equipment in place.

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