Improve your trucks sparking ignition and replace your old worn out spark plugs with our selection below. Knowing when to replace your trucks spark plugs can help reduce any further problems and damage from occurring in the future. Replacing out your old spark plugs from misfires can help when trying to get your truck to start, and keeps your truck from long term damage. Check out other accessories that go great with our spark plugs such as our intercoolers, or our Catch Cans. 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.