The MagnaFlow 2021 - 2024 Ford Bronco Street Series Axle - Back Exhaust is perfect for Ford Bronco owners who love hitting both highways and off - road trails. Whether you're going on a long road trip or exploring rough terrains, this exhaust system enhances your driving experience. The main piping is 2.5 inches, and the dual tips are 4 inches. It fits 2021 - 2024 Ford Broncos with a 2.7L twin - turbo V6 engine, so if you own one of these models, it's a great upgrade for you.