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Top 10 5.9L Cummins Tech Articles

Drivetrain and other upgrades for trucks powered by Cummins fans’ all-time favorite engine.

Dec 4, 2020
There is no arguing the notion that Cummins diesel engines are widely revered. Many enthusiasts wholeheartedly believe the powerplants are the greatest oil burners ever produced. Seriously, the brand has legions of followers.-pp
But, given all of those loyal fans, only one Cummins diesel—the 5.9L 6BT (12- and 24-valve)—sits at the top of the popularity ladder when it comes to modifying and upgrading for increased performance.
The engine had a remarkable run in Dodge Ram trucks (1989 to 2007) and essentially is one of the catalysts that started the boom in exploring high performance for non-commercial/consumer-category diesel pickups.
As engines that are very receptive to air and especially fueling enhancements, the bulk of 5.9L Cummins-tech content that MotorTrend's truck staff produced over the years is highlighted by turbocharger installations and dyno tests, fuel-injector and injection- and/or lift-pump upgrades, as well as reports on preventative-type hacks and products to ward off potential damage to engines, caused by stock parts that typically succumb to increased forces, pressures, etc., when power and torque increases.
We can probably do "Top 10" rundowns on our 6BT content from now until the end of time. Here is a solid mixed bag to get things started.
Photo 2/11   |   002 10 Best 5 9l Cummins Tech Stories

24-Valve Intake-Manifold Swap

Photo 3/11   |   003 10 Best 5 9l Cummins Tech Stories

Fuel for the Masses

Photo 4/11   |   004 10 Best 5 9l Cummins Tech Stories

Boost Is Best

Photo 5/11   |   005 10 Best 5 9l Cummins Tech Stories

Clutch Play

Photo 6/11   |   006 10 Best 5 9l Cummins Tech Stories

5.9L's Fatal Flaws

Photo 7/11   |   007 10 Best 5 9l Cummins Tech Stories

Cummins Cam Tech

Photo 8/11   |   008 10 Best 5 9l Cummins Tech Stories

Basic 12-Valve Performance Bolt-Ons

Photo 9/11   |   009 10 Best 5 9l Cummins Tech Stories

Cummins and Ram Celebrate 25 Years

Photo 10/11   |   010 10 Best 5 9l Cummins Tech Stories

5 Sure-Shot 5.9L Common-Rail Upgrades

Photo 11/11   |   011 10 Best 5 9l Cummins Tech Stories

Engine Swaps: A 6BT Works in Anything