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Stealth Module - Ram Cummins 5.9L (2003-2007) - Stealth Performance Products
Stealth Module - Ram Cummins 5.9L (2003-2007) - Stealth Performance Products
Stealth Module - Ram Cummins 5.9L (2003-2007) - Stealth Performance Products
Stealth Module - Ram Cummins 5.9L (2003-2007) - Stealth Performance Products

Stealth Module - Ram Cummins 5.9L (2003-2007)
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17 17 (4.9 out of 5.0)

Regular price $550.00 Sale & FREE Shipping (US)

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Make your diesel have more efficient power and fun to drive with our Ram Cummins 5.9L Stealth Module exclusively for Ram Cummins years 2003-2007.  Your module will be a stand-alone computer that simply plugs in under the hood of your truck.  It will not increase fuel volume, so there’s no need for any other modifications.  Make your truck work smarter, not harder!  Get that extra boost in performance without any harmful side effects.

Works with:

  • Ram Cummins years: 2003, 2004, 2005, 2006, 2007
  • Ram Cummins diesel models: 2500, 3500, 4500, 5500
  • Automatic and manual transmission

The Ram Cummins 5.9L Stealth Module provides: 

  • Better throttle response
  • Decreases turbo lag
  • An increase in low to midrange power where you need it
  • Unleash—Increased hp, 120 ft-lbs of torque*
  • Reliable torque increase
  • Safe for towing and everyday driving
  • Stays within stock safety parameters
  • Stealthy technology does not leave a footprint in the ECM
  • Potential fuel economy gains. Most customers see a 10-20% increase with proper driving habits. 
  • Smooth and predictable power across the entire RPM prevents the transmission from struggling to find power and hold gears
  • Includes all weather factory style OEM plug and play connectors for quick and easy installation

How it Works:

The module is a stand-alone computer that plugs in under the hood.  The internal software meticulously works to optimize the injection pressure to amplify combustion efficiency.

By bringing the fuel rail pressure to its desired pressure sooner, it allows for finer fuel atomization.  In turn, elevating fuel-air mixture.  This allows for better combustion quality, efficiency, and power output.  The end result is more torque where you need it, less turbo lag across the whole RPM spectrum, and increased throttle response.  Keep in mind, your truck’s stock safety parameters remain in place.  The module is a safe solution for every day driving and hauling.

Selectable vs. Non-Selectable:

  • The selectable module includes a switch with 4 modes:
    Stock, Low, Medium, and High
  • The non-selectable module does not include a switch. It comes preset in the Medium mode 
Why sacrifice peace of mind when looking for a little bump in performance? No endless modifications or flashes to your trucks computer. This is the easiest and safest way to give your truck improved performance. A cost-effective approach to wake your truck up starts here. Backed by a limited lifetime warranty, includes 24/7 technical support, and superior customer service. Finally a high-quality, safe, and non-invasive performance solution your truck has been waiting for. See why thousands of diesel pickup owners are turning to Stealth.

Mileage is impossible to guarantee with any modifications. Anyone that claims otherwise you should be very leery of. The majority of Stealth Equipped vehicles do see a mileage increase due to using the efficient low-end power our module provides to keep their RPMs down and hold higher gears. With responsible driving habits it's not uncommon to see a nice bump in MPG along with an all-around better driving experience. You're welcome to reach out to us so we can provide you with any tips we have learned from first-hand experience and speaking to tens of thousands of diesel owners.

Part Numbers:
SM2003E (Non-Selectable)
SM2003P (Selectable)
  • Shipping & Warranty


Standard shipping takes 5 - 7 business days.

Expedited shipping takes 1 business day.

Note: Any orders made after 12:00pm EST may be processed the next day.



You can read full details regarding returns, refunds, and warranty information here.

Customer Reviews

4.9 Based on 17 Reviews
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Thomas L.
United States United States

2007 Dodge 3500

Product was easy to install. Has improved fuel mileage and torque. Has really made a difference pulling are 32 foot fifth wheel camper

Thomas L. verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
John Belknap

2006 Mega Cab 4x4 5.9

Hauling a 5th wheel and needed lower end torque for merging onto highways. Work in progress. Still trying to determine which setting is best for hauling when full but the top setting when truck is empty is really impressive. Really has a punch to it. Unit was very easy to install and Stealth was easy to to reach and address my concerns. Still need to check any increases in mpg.

John Belknap verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Dane Huffman

Heavy towing

Daily driving 90 hp setting is up 3mpg. Towing 19k fifth wheel on 30 hp setting is up 1.5 mpg. I am very satisfied with this product. Handles hill climbs and head winds much better. Took less than 20 minutes to install and be back on the road!

Dane Huffman verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Dalton Hasbargen

Couldn t of asked for a better product to put in my pickup. Great throttle response, fuel economy, and reliability.

Best people to work with, straight forward product and installation. And made the world of a difference in my pickup. And now it is more enjoyable to drive, and gets awesome fuel mileage for a big truck. Thank you stealth for producing such a great unit!

Dalton Hasbargen verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Daniel Schroeder

07 5.9 Cummins diesel

The stealth module has woke my truck up! Unbelievable horse power! It's like a new truck!

Daniel Schroeder verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Alvin S. Peyton

Simple plug-in Easy to mount Making your "old truck" new

I bought my Ram 2500 CTD brand new in 2004. It has given me 14 years of great service, but now that I am retired, I wanted to give it a little boost and hopefully improve my mpg while towing. The installation took about 5 minutes. I mounted everything under the hood and set it on the "medium" setting. I could immediately notice a marked improvement in throttle response. I haven't had it long enough to do a true mpg comparison, but I am expecting good results. I'm very pleased with my purchase. The Stealth gave a little new life to my 2004 CTD.

Alvin S. Peyton verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Alvin Peyton

What's Not To Love??? 2004 Dodge Ram 2500 CTD 5.9 HO

I did a great deal of research before deciding the "Stealth" module was right for me. I bought my Ram 2500 brand new...14 years ago. It has given me 92K wonderful miles. I was simply looking for something to offer better mpg while maintaining and/or increasing power and torque. Installation was so simple, I spent more time routing and dolling up the wires than I did with the installation. I haven't had it long enough to obtain a good mpg challenge, however, the throttle response is amazing and I am running the "medium" setting. I have no idea what I would use the "high" setting for???!!! So far, I am very happy with my purchase. Does your 5.9 need a little booster shot? Look no further than the Stealth!!!

Alvin Peyton verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
A Stealth Performance Products Customer
Eric Mattison

04 Dodge Ram 3500. stealth equipped literally a 30min install two quick plugs and I installed the switch on my dash for easy control, no more dead pedal, MPG increased by 10mpg on the freeway, pulls great. I have recommended this product to all of my friends. you'll be happy with the investment.

Dalton Hasbargen

Best option I could of ever purchased for my pickup. Reliable, responsive, and easy to install. My mileage went up to 23.5 mpg doing about 65 mph. Very happy with the results and I will forever recommend to my fellow diesel brothers.

Dalton Hasbargen verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
A Stealth Performance Products Customer
Jeff Ecv Jefford

installed the selectable module in my 04 dodge 5.9 was very suprised at the performance it gave very happy and best part is it doeant reflash the ecm it keeps factory saftey protocals in place very nice ordering for my friends 2018 6.7 cummins and his 17 duramax

A Stealth Performance Products Customer
Philip Link

This thing is pretty great!! Woke it right up! Would definitely recommend it!

Michael Blake

Power, acceleration, and gas mileage. I have it on the lowest setting. My gas mileage went up 2 miles per gallon, while pulling a trailer

Michael Blake verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Enrique Dominguez

Stealth has given me 6/7 mpg more, very greatful

This has given great fuel mileage, was getting 19/20 and now 25/28 mpg, really enjoying the stealth. Great torque without downshifting. Now Ive got two coworkers into buying some for them and they love it as well

Enrique Dominguez verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Aaron Bay

2007 2500 5.9 4x4 leveling kit with 35's

I just bought this module last week and after taking with Eric on the phone I was convinced! This truck not only increase my hp and throttle response but I have increased 2-3mpg's on medium setting and absolutely love blowing past people from a stop! I installed this module in 15 minutes and it's super easy. The fact that it's untraceable makes this stealth module even better! I'm about to haul my new 37' fifth wheel in the next few weeks so we'll see how it does! Thanks again Stealth Performance Products! And thanks Eric for being helpful on the phone.

Aaron Bay verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
manuel Preciado

2006 Dodge Ram

Happy with the product, noticed the power from the second I installed it. Noticed the gas mileage(3-5+mpg) and I can't wait to pull my 30ft fifth wheel to notice the difference.

manuel Preciado verified customer review of Stealth Module - Ram Cummins 5.9L (2003-2007)
Ram 2500

Love the performance it delivers

I have made 2 round trips to California with the module now. Over 6k miles on it. Averaging 22.6 mpg. Love the performance it delivers and it flattens out the hills.

Sam Rhodes

2011 ram 2500 6.7

Great module it's like you truck wakes up and is a beast. Great fuel mileage with trailer through mountains. Great customer service. I would highly recommend you get one and see the difference

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