Upgrading Your LML Exhaust Manifold the Right Way
If you've spent much time under the hood of a 2011-2016 Duramax, you probably already know that the stock lml exhaust manifold is one of those parts that just doesn't live up to the rest of the engine's heavy-duty reputation. It's a bit of a bottleneck, honestly. While the LML engine itself is a workhorse capable of pulling massive trailers and putting down decent power, the way the factory designed the exhaust flow—especially on the driver's side—is a bit of a head-scratcher. ...