The BORLA(r) 11969 exhaust system was developed specifically for the Mazda CX - 5. Our Axle - Back system replaces the factory rear muffler and is a direct bolt - on product for ease of installation. The S - Type sound level has been tuned for the CX - 5s 2.5L engine to provide a slightly more aggressive sound than the stock exhaust. BORLA(r) guarantees a drone - free exhaust system for a comfortable driving experience. Ultra - smooth mandrel bends ensure maximum flow power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. System Features Axle - Back Exhaust System S - Type Sound Level T - 304 Stainless Steel Construction 2.5 to dual 2 Pipe Diameter 4 Polished T - 304 Stainless Steel Tips No - Drone Million Mile Warranty Bolt - On Installation