This Mid-Section features 3" diameter pipes and the classic S-Type sound. It fits with either the O.E. tail pipes or BORLA® tailpipes 60640, 60640BC, or 60640CFBA. BORLA(r) Cat-Back(tm) & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA(r) Sound of Power respected by motoring enthusiasts everywhere. Built from premium T-304 stainless steel, superior to T-400 series (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(r) stands behind every Mid-Section with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.