The 5.9 Cummins is said to be one of the most reliable diesel engines, but that doesn't mean it can't benefit from upgrades. Here's what owners recommend.

Exploring the history of Cummins’ venerable 5.9-liter diesel engine and its many revisions.

Check out Diesel Power's Exclusive Cummins Buyer's Guide featuring products from Hypertech, Superchips, Bully Dog and many others, only on dieselpowermag.com, the official website of Diesel Power ...

Today, sixteen years after it was discontinued, the 5.9-liter Cummins is arguably the most legendary diesel engine ever produced on American soil.