Latest News

featured The D&J Performance Series 6.7 Cummins is the Ultimate Foundation

If you own a 6.7L Cummins, you bought it for its performance and history of reliability. But there comes a point in every diesel owner’s journey when the original motor...

On Jun 15, 2026 by Cecilia Herrell 0 Comments

Why Your Cummins Needs Billet Valve Bridges

Think of upgraded valve bridges as cheap insurance for your engine. If you are already doing head studs, springs, or pushrods, leaving the stock bridges in place is like putting...

On Jun 10, 2026 by Cecilia Herrell 0 Comments

The Ultimate 6.7L Cummins Billet Breather Cover Upgrade

At D&J Precision Machine, we believe your engine components should match the heavy duty nature of the truck itself. That’s why we engineered the all new Billet Cummins Breather Cover,...

On May 22, 2026 by Cecilia Herrell 0 Comments

6.7 Cummins Stage 1 Performance Cylinder Head

Unlock More Power: Why the 6.7 Cummins Stage 1 Performance Head is the Perfect Upgrade for Your Dodge Ram

Discover why the 6.7 Cummins Stage 1 Performance Head is the perfect upgrade for your 2007-2018 Dodge Ram. Learn about the 42% airflow improvement, complete rebuild process, and real-world performance...

On Apr 21, 2026 by Marcosm LLC 0 Comments

Which D&J Precision Machine Cummins Crate Engine is Right for You?

When it’s time to replace or upgrade the engine in your Cummins, the amount of options can be totally overwhelming. Are you just looking for a reliable replacement for your...

On Mar 30, 2026 by Cecilia Herrell 0 Comments

The 1,000 HP Sweet Spot: Why the D&J Street Performance 5.9 Cummins is the Ultimate Street Build

If you’re a 3rd Gen Cummins owner, you know the 5.9L Common Rail is a well built machine. It’s the engine that put diesel performance on the map. But as...

On Mar 21, 2026 by Cecilia Herrell 0 Comments

The Guide to Choosing the Right Long Block for Your Build

If you're upgrading, replacing, or building a high performance diesel engine, the long block is the heart and soul of your project. Choosing the right one is arguably the most...

On Mar 18, 2026 by Cecilia Herrell 0 Comments

Popular Products

2007-2018 6.7 Stage 1 24v Cummins Performance Head

2007.5-2018 6.7 HP Reman Cylinder Head

2003-2007 5.9 CR Stage 1 Cummins Performance Head

Popular Products

2007-2018 6.7 Stage 1 24v Cummins Performance Head

2007.5-2018 6.7 HP Reman Cylinder Head

2003-2007 5.9 CR Stage 1 Cummins Performance Head

Latest News

Categories

RECENT ARTICLES

The D&J Performance Series 6.7 Cummins is the Ultimate Foundation

Why Your Cummins Needs Billet Valve Bridges

The Ultimate 6.7L Cummins Billet Breather Cover Upgrade

Unlock More Power: Why the 6.7 Cummins Stage 1 Performance Head is the Perfect Upgrade for Your Dodge Ram

Which D&J Precision Machine Cummins Crate Engine is Right for You?

Blog Tags

featured The D&J Performance Series 6.7 Cummins is the Ultimate Foundation

Why Your Cummins Needs Billet Valve Bridges

The Ultimate 6.7L Cummins Billet Breather Cover Upgrade

Unlock More Power: Why the 6.7 Cummins Stage 1 Performance Head is the Perfect Upgrade for Your Dodge Ram

Which D&J Precision Machine Cummins Crate Engine is Right for You?

The 1,000 HP Sweet Spot: Why the D&J Street Performance 5.9 Cummins is the Ultimate Street Build

The Guide to Choosing the Right Long Block for Your Build

Popular Products

2007-2018 6.7 Stage 1 24v Cummins Performance Head

2007.5-2018 6.7 HP Reman Cylinder Head

2003-2007 5.9 CR Stage 1 Cummins Performance Head

Popular Products

2007-2018 6.7 Stage 1 24v Cummins Performance Head

2007.5-2018 6.7 HP Reman Cylinder Head

2003-2007 5.9 CR Stage 1 Cummins Performance Head

Popular Products

Latest News

Categories

RECENT ARTICLES

Blog Tags

newsletter sign up

Shop the look

Choose Options

Back In Stock Notification

Popular Products