2015 F150 trucks definitely have very good engines in terms of the sound, performance and efficiency, however if you are looking to spice up your truck a little bit and give it a deeper rumbling tone - our performance exhaust systems will help you out! Recently updated flowmaster exhaust systems sounds trully amazing and allow you to improve the exhaust flow a little bit for better efficiency and performance. There are two sound levers: moderate and extreme: Moderate/agressive: Flowmaster® - American Thunder™ Stainless Steel Dual Cat-Back Exhaust System Super 40 Series Muffler 3" Muffler Inlet / 2.5" Muffler Outlet. Muffler Shape: Oval. Dual Out Rear Exit. 2.5" Tubing. 3.5" Polished Round Tips and Aggressive Flowmaster® - Outlaw™ Stainless Steel Dual Cat-Back Exhaust System Super 10 Series Muffler. 3" Muffler Inlet / 3" Muffler Outlet. Muffler Shape: Oval. Dual Out Rear Exit. 3" Tubing. 4" Double Wall Angle Cut Polished Tips They sound in the best traditions of performance trucks. Check the sound of the Outlaw exhaust in this YouTube video: https://www.youtube.com/watch?v=twHKPCtMCR4 What do you think about adding a deeper exhaust tone to your F150?