This came from a storage that had many items that were removed for high performance upgrades. It had resonator removed and replace with x-pipe. Because its modified with an x-pipe and I’m unable to test fitment length I’m selling as is for parts only. I did test fit to a factory header / catalytic convertor pipe and it fits good at x pipe. I believe this came off a 2019 Mustang. The mufflers part numbers come back to 2018-2021 as far as I can tell. Muffler part numbers are F1-8831R and F1-8831L.