2017 For sale, new axle-back exhaust from the original Roush company. Mustang GT model 2015 to 2017. 8-cylinder engine 5.0 liter. Product number 421834. Roush Exhaust Axle Back Mustang GT. Price 3800. To order through the online store (American Performance Exhausts). Free shipping to all regions of Saudi Arabia. Product ready for delivery within 3 to 4 days for delivery.