EXCEPT Convertible. System contains a merge X-Pipe for increased performance while enhancing the aggressive ATAK(r) sound. It has dual 4" tips with carbon fiber shells and bright centers, and will fit vehicles equipped with Dual Mode Exhaust (NPP), but it does NOT include Dual Mode or AFM valves. On vehicles equipped with AFM a check engine light will be activated. It may be used with the dual tip lower bumper cover to convert a single, split rear exit to a dual split rear exit. 3" Diameter system is intended for vehicles with significant upgrades that require a larger diameter exhaust. It is recommended for use with Long Tube Headers. 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. 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(r) 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.