Beyond the Block: What Makes D&J Precision Machine Unique
In the world of diesel performance, we aim to be the best & provide top tier components for your diesel. When you’re pushing 100+ lbs of boost or demanding 2,500+ horsepower for a record breaking pass, the area between a win and a catastrophic engine failure comes down to thousandths of an inch. That's where we come in.
At D&J Precision Machine, we don’t just build engines, we engineer confidence. From our shop in Ohio, we’ve spent years perfecting the Cummins platform. But what actually happens behind our doors that makes a D&J build different?
1. Billet Parts
For years, diesel owners were limited by the abilities of the factory blocks. When we realized the industry had reached a ceiling, we didn’t just look for better parts, we decided to make them ourselves.
With our own CNC machines, we can create full billet components, including our popular intake manifolds. By manufacturing our own products, we eliminate the middleman and ensure that every curve & cut meets our strict quality standards.
2. Solving Common Problems
Even if you aren't building a 3,000 HP sled puller, precision still matters. Take the 6.7L Cummins cylinder head, for example. A common factory flaw is the valve seats loosening up over time.
Our HP Reman Cylinder Heads aren’t just refurbished; they are re-engineered. We address the OEM weaknesses with upgrades that ensure your daily driver or heavy hauler stays on the road longer and runs cooler.
3. The Enforcer
You might have seen D&J engines powering some of the fastest diesel door cars in the world, like the purple Firepunk Duster. That same racing DNA is molded into every product we sell.
Whether it’s our FSR Pistons with steel ring lands or our Ready Run Crate Engines, we use the track as our ultimate testing ground. If a part can survive the real world abuse, you can trust it to handle your daily commute or pulling a heavy trailer.
4. Innovation
We may have some of the best machines in our shop, but the real secret to our precision is our team.
Founded by Drew Pumphrey, D&J Precision Machine is one of the leaders in diesel performance. Our engine builders don't just follow a manual, they understand the why behind the build. We’re a team of enthusiasts building for enthusiasts & racers.