NOT Compatible with the 3.5L PowerBoost. This Mid-Section / Muffler Assembly features 3" diameter pipes and the classic S-Type sound with no drone inside the vehicle. It fits with either Borla(r) tailpipes 60640 60640BC or 60640CFBA. or the Original Equipment (O.E.) tail pipes. Borla(r) Cat-Backâ„¢ & 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.