LB7

An upgraded intercooler is the best reliability upgrade or supporting mod for the Duramax LB7. While it won’t provide big power gains like the other bolt-on mods, it will help keep EGTs and engine temps lower while also providing more consistent performance. Whether you are stock or heavily modified an intercooler will provide great performance…

The exhaust system on the Duramax LB7 is one of the most restrictive parts with respect to performance. If you are looking to increase power, especially if you are tuned, an exhaust is one of the best LB7 upgrades. With power gains ranging from 20-30+whp and 40-60+wtq an upgraded exhaust will provide big power gains,…

If you’re looking to add a bit of extra power to your Duramax LB7, a tuner or programmer is hands-down the best bet. Tuning will unlock the biggest horsepower gains for a relatively inexpensive price, making it the best bang-for-your-buck LB7 modification. In addition to adding upwards of 100whp and 150+wtq tuning will provide better…

A cold air intake can add up to 15whp and 25wtq to the Duramax LB7, among a number of other performance benefits, this makes an intake one of the best performance upgrades for these engines. Outside of just power gains you get improved gas mileage, better throttle response, and faster turbo spool. Ultimately, it creates…

The Duramax LB7 was the first engine released under the new 6.6L Duramax platform. The LB7 was considered a strong and stout engine for the time, producing 235hp and 500lb-ft. of torque which was upgraded to 300hp and 520lb-ft. of torque in 2004. Fortunately, this is a pre-emissions engine and therefore can be easily modified…

Outside of a number of common but not catastrophic problems the LB7 Duramax is a stout engine with good reliability and performance for its age. While the engine isn’t necessarily built to be tuned to produce massive amounts of power, it does a great job of being a solid stock work truck. With that being…