Parts & Accessories Spare parts Peace be upon you, American MBRP muffler with an additional resonator. The muffler fits the F-150 from model 2021 and above without any modifications. Remove the stock muffler and install it directly. You have the option to install the resonator or not. The muffler has a luxurious and quiet sound, giving you engine power without noise or tickets. Video clips are available to demonstrate the sound.