Duramax LML vs. LMM Engine Differences
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Duramax LML vs. LMM Engine Differences

The LML engine got a major overhaul in 2011, compared to the previous LMM Duramax engine. It featured nearly 60% freshly designed parts, only leveraging a portion of the previous engine design. Up to this point, all of the previous Duramax’s had some internal weaknesses and common problems with bending rods and cracking pistons. The…

Duramax LML Downpipe Upgrade Guide
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Duramax LML Downpipe Upgrade Guide

One of the best performance upgrades for the Duramax LML is a 3″ downpipe. A downpipe will help reduce exhaust backpressure, providing good power gains in addition to lower EGTs, faster turbo spool, better gas mileage, and more. Through our performance brand, Boosted Performance, we’ve been making downpipes and performance products for Duramax engines for…

Duramax LML EGR Delete Guide
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Duramax LML EGR Delete Guide

Aside from the DPF filter and other exhaust-related emissions systems, the Duramax LML also has an EGR system. EGR systems have a few components, most notably the EGR cooler, than are prone to failure. Additionally, it’s bad for engine longevity and restricts performance. For both performance and reliability reasons, deleting the LML’s EGR system is…

Duramax LML Cold Air Intake Upgrade Guide
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Duramax LML Cold Air Intake Upgrade Guide

A cold air intake is the second best performance modification for a Duramax LML, with the first being tuning. An intake will provide horsepower and torque gains through airflow increases, but will also increase throttle response and turbo spool, and add about 1-2mpg of fuel economy improvements. We’ve been installing intakes on Duramax trucks for…