The Axle-Back Exhaust systems by Magnaflow are designed and tested to improve the overall performance of the Wrangler JL vehicle. Made from 409 stainless steel, the axle back system will deliver a rich tone that delivers power at the right times. The muffler is an unrestricted, straight flow- through design that increases horsepower and torque without losing any exhaust efficiency. While giving a deeper tone on the outside, the system has been engineered to reduce interior noise levels that meet all SAE J1169 standards. The Axle Back systems are available in your choice of including Stainless Steel or High Temp Black Coated Stainless.