The 5 Best Duramax LMM Performance Upgrades
A few simple performance upgrades can take the Duramax LMM to over 500whp. We’re going to cover the five best mods to get it there: tuning, a cold air intake, exhaust, downpipe, and intercooler. These upgrades alone can easily add over 100whp and 200wtq, pushing the LMM up against some of its performance roadblocks. So…