This system will fit vehicles with and without NPP. Borla(r) system does NOT include NPP valves. System contains a X-Pipe for increased power while enhancing the aggressive ATAK(r) sound. It exits through and 4" polished T-304 stainless steel tips for sharp appearance. Borla(r) Cat-Back(tm) & Axle-Back multi-core technology is designed 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 high-quality 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 numeric 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. System ships in 2 boxes.