Borla cat-back exhaust system.

This vehicle NOT sold in North America. Do not use adapter for a full 3" inlet. It delivers the classic S-Type sound with no drone inside the vehicle. Add optional resonator 60666 when additional sound reduction is desired. The resonator is NOT designed to be used with the Original Equipment (O.E.) exhaust system. BORLA® Cat-Back & 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. Just what you’d expect from the world’s most experienced (and most winning) exhaust brand.

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