This 2.5" diameter Borla(r) Cat-Back(tm) system is designed for use on EcoBoost cars WITHOUT the Active Exhaust feature. It features the classic S-Type sound with no drone inside the vehicle and dual 4" round carbon fiber tips with black anodized centers on each muffler assembly. Systems with bright chrome on T-304 stainless steel and black chrome on T-304 stainless steel tips are also available. If your car has 1 tip on each muffler and you want to upgrade it to 2 tips on each muffler (also know as quad tips) this is the system for you. It is designed to work with the quad tip (2 tips per muffler) O.E. Ford Valance ONLY. To install this system on a vehicle that came with one tip per muffler you will NEED TO BUY and install a different valance. Ford quad tip valance part numbers: With Parking Sensors = PR3Z-17F828-DA Without Parking Sensors = PR3Z-17F828-CA. Borla(r) Cat-Back(tm) and 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(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 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.