This brake master cylinder is precision-engineered to match the design, function, and performance of the original master cylinder on specific vehicle years, makes and models. It is made of new, high-quality materials for a safe, durable replacement. Vehicle model years this part fits: Ram 2500: 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ram 3500: 2012, 2013, 2014, 2015, 2016, 2017, 2018