We are very happy to announce SoCal Diesel Chromoly Rocker Bridges for 2001-2016 Duramax applications! The SoCal Diesel Chromoly Rocker Bridges are single piece construction opposed to the factory two piece rocker bridges. SoCal Diesel Chromoly Rocker Bridges are stronger yet significantly lighter than the OEM bridges. Remember, less weight in the valve train means less time building up to maximum RPM!