The factory Y-pipe of your F150 EcoBoost is extremely restrictive and chokes your F150's turbochargers with back pressure, which prevents them from breathing easy and making power. Aftermarket downpipes feature larger tubing and high-flow cats that let your turbos breathe easier and get your truck a ton of power with the right custom tuning. These downpipes are made to remove hot harmful gases away from your engine and other components while pushing it out. Make sure to take a look at our tuners and monitors or our turbocharger upgrades.Ford F-150 Fitments: 2011, 2012, 2013, 2014 Ford F150 with 3.5L Ecoboost engines. Submodel Fitments: FX2, FX4, King Ranch, Lariat, Limited, Platinum, STX, XL, XLT. Some Exceptions apply, please see individual product pages for specific fitments.