I know you guys have been waiting for this data, and it’s still incomplete. The videos are all being edited as I type this. Here are my notes on the following Cat-Back Exhausts we tested. As you can tell below, these aftermarket cat-back exhausts DO MAKE POWER regardless of the stock tune. There is more … Continue reading We test 4 different Cat-Back Exhaust for the 2015 to 2023 Ford Mustang EcoBoost