This 2.5" diameter Cat-Back system fits vehicles with Original Equipment (O.E.) Turn Down Tail Pipe. For vehicles with O.E. Exhaust Tip use Cat-Back system 140379. The system delivers the classic S-Type sound with no drone inside the vehicle. The exhaust exits thru a 2.5" brushed T-304 stainless turn down pipe. 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. Each system is built from premium T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.