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We offer the Original “Warranty-Friendly” Diesel Pro Module. The performance alternative to dangerous re-programing and delete systems.

When we began offering diesel performance modules over twenty years ago, we focused on improving the performance of underpowered diesel pickup engines. Today, with the technically advanced ‘Big Power’ diesel engines, we now focus on restoring the low-end power and mileage that emissions de-tuning has taken away. We accomplish this with sophisticated combustion technology that works with your engine’s stock setting. This approach makes your new performance module not only WARRANTY-FRIENDLY and POWERTRAIN SAFE, but a cost-effective investment against rising fuel prices and poor low-end performance.

Your new performance module will deliver an adjustable 90HP where you need it – (the driving zone) and up to 100 additional driving miles per tank of fuel. More importantly, it will allow you to maintain your stock engine’s integrity for better trade-in/resale value and avoid the possible legal ramifications of “delete programs”.

Upgrade your diesel’s performance with confidence!

We offer a 30-day Unconditional 100% Money Back Guarantee … Nuff Said.

The Early Days of Diesel Modifications

Barry “Doc” Sadler

In 1995 the late, multi-record holder, Barry “Doc” Sadler seemed to instinctively know how to increase his Cummins diesel power, without the common side effects that plagued the aftermarket industry.

The antiquated method of simply adding fuel to increase power had its shortcomings and its costly consequences, such as overheating, bellowing black smoke, and even engine failure, thus Dr. Performance Inc. was born.

The Company focused on improving diesel engine performance in a “warranty-friendly” way. Their outstanding patented performance fuel injectors set a new industry benchmark, as well as their post-ECM performance modules.

Because our performance modules are “Post-ECM” and work with the manufacturer’s settings rather than deleting or changing them, our customers benefit from functional performance improvements without sacrificing future trade-in value, black smoke, and excessive engine wear caused by over-fueling.

Today, the Sadler family and a team of professionals are dedicated to continuing the Dr. Performance legacy with safe, state-of-the-art performance products for today’s sophisticated diesel engines.

Diesel Modules:      Pickup Trucks     Medium Duty / RV     Heavy Duty / Semi      Agriculture / Construction

Lubricants & Fuel Treatments:      Diesel Engines      Gasoline Engines      HVAC

Shipping to United States and Canada only.


(866) 406-3777
We are the ORIGINAL warranty-friendly diesel performance solution.

Text: (406) 202-4877
Average live Text response time 15 minutes (during normal business hrs.)

Mailing Address:
Diesel Modules LLC
Helena, MT. 59601

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