After upgrading your truck with a new torque converter, you might notice that the flex plate or flywheel on your 2011-2016 GM 2500HD/3500HD's transmission is worn out or not meeting your heavy-duty performance standards. Our selection of aftermarket flex plates offers the perfect solution for your transmission issues. Precision-engineered and built with high-durability materials, these flex plates are designed to improve gear shifts and enhance your transmissions health. Grab your new flex plate for your GM 2500HD/3500HD from Alligator Performance. Check out our great selection of Rebuild Kits & Internal Parts to maximize your transmission's reliability and performance! GM Duramax Fitments: 2011, 2012, 2013, 2014, 2015, 2016 GM 6.6L Duramax.Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.Some exceptions apply, please see individual product pages for specific fitments.