20300 - Area Diesel Power Module ISB 5.9L (98.5-02)

20300 - Area Diesel Power Module ISB 5.9L (98.5-02)


Order Shipment Notice: 

Most orders are shipped within 24 hours from the order date. Orders placed on the weekend or after cutoff on Friday, and orders placed on select holidays are processed on the next business day. Please see our shipping terms for more information.

Part # 20300 - Area Diesel Power Module ISB 5.9L (98.5-02)


  • 1998.5-2002 ISB 5.9L w/ VP44


The 20300 Truck Edition module fits the ISB 5.9L Cummins 24V engine utilizing the VP44 injection pump from 1998.5 thru 2002. The Area Diesel Truck Edition Module is designed for everyday use whether you are towing or just looking to save some money on fuel costs. We have been getting fantastic feedback from our customers regarding this module and ZERO issues.

The Truck Edition module will increase your power 65HP over stock all while delivering fuel economy benefits of 1/2 to 1 mpg. They are dyno tested to a 30k load so we can ensure that you are towing safely. This module is self-adjusting based on load and will deliver up to 20% more power when needed.

And before you ask…no we do not flash your ECM! Instead we receive the data from the ECM and optimize the signal to the engine to improve both power and fuel efficiency. True Plug-and-Play connectivity means we aren’t going to ask you to cut and splice any wires. Just connect the Truck Edition module into your existing factory connectors.

I have a 2000 Fleetwood 36S diesel pusher with 5.9 litre ISB Cummins 275 hp turbo. Allison MT-643 Tranny on Freightliner chassis. Block casting #55. I want a performance upgrade with programming chip and digital engine monitor plug and play, what is available. Engine sn 56621711. ( Wayne, 10/23/2020 )
We do not have a monitor that would be integrated with a performance module. The 20300 module would work great for adding power and we would recommend adding the exhaust gas temperature gauge as well: https://www.ultrarvproducts.com/64009-Banks-Power-Exhaust-Gas-Temperature-Gauge-Kit-For-Diesel-Pushers ( Support )
Why out of stock?
1998 Monaco ISB 275.
Where and how does it plug in if you ever get another?
( Jim Bennett, 07/06/2020 )
We are expecting to have more of these in stock about mid-July 2020. This plugs directly into your high pressure fuel injection pump, which is mounted at the back of the engine. It is a direct fit connector so installation is pretty simple. ( Support )
will this work with a BANKS system installed (turbo and ecm) on my 2000 Fleetwood Discovery? ( John Wood, 05/17/2020 )
We do not recommend "stacking" performance modules. It would work with just the Banks turbo but not with their ECM installed. ( Support )
Will this work on my Fleetwood RV the engine Cummins sn is 56584755 ( John Wood, 05/17/2020 )
Yes it will. ( Support )
I have a 2001 Thomas bus with a 24v cummins engine mated to an Allison AT545 auto Trans. WILL this 20300 tuner work on this bus? the bus has the industrial J1939 (9pin connector) If you say no it will not connect because of the 9 pin connector, what if i use a converter cable to convert the J1939 9Pin connector to an OBD2 port to connect to this tuner? ( Ken Gingerich, 09/12/2019 )
This performance module will work on your application. The module will plug directly into your Bosch VP44 injection pump, not into the round diagnostic port. ( Support )

Will your 20300 - Area Diesel Power Module ISB 5.9L (98.5-02) work with my 1999 Freightliner school bus? Cummins 5.9L serial no. 56503528.

( Woody Johnson, 07/21/2019 )
Yes it will. ( Support )
I have a 2002 Newmar Kountry Star 36' diesel pusher equipped with a Cummins ISB 5.9 rated at 300 hp and 660 ft lb of torque. The transmission is an Allison MH 3000. Will this tuner connect to existing wiring and increase torque and hill climbing ability? In addition I would probably install a EGT gauge in addition to monitor engine. ( Jeff Sargeant, 04/18/2019 )
Yes this would plug in right at the high pressure fuel pump, one single connection. Your 3000MH will be able to handle the extra power just fine but you are right that a pyrometer is a great idea. ( Support )
Hello I just ordered the 20300 module but where can I find installation instructions? Will it be included in the packaging? Thank you ( Adrian , 04/08/2019 )
This module will include the installation instructions. It is really very simple, just one connection going into the fuel injection pump on the side of the engine. ( Support )
I have an 03 freightliner fs 65 school bus with a 5.9l isb cummins will this module work on my unit. where does it plug into ( chris, 02/13/2019 )
I ran your VIN through the Cummins system and it shows as having a VP44 fuel injection pump which this module is designed to fit. This module will plug into the main fuel pump connector. ( Support )
Will this tuner work on my 34wds ( Morris Wivell, 02/09/2019 )
Based on your VIN you have a 1998 ISB and the 20300 module would be correct. ( Support )

I'm interested in purchasing this tuner. I'd like to confirm it will work for my 2000 fleetwood discovery 37g with a 5.9 cummins isb 300hp

( Adrian , 01/28/2019 )
Yes this tuner will work for your RV.  ( Support )
I have a 2001 Fleetwood Expedition with a 260HP ISB Engine and wonder what improvement I can expect for this application. ( Tom ONEILL, 10/11/2018 )
You can expect a noticeable gain in power but I do caution customers that if they have an Allison 2000MH transmission it may not be able to handle the increased torque.  ( Support )
I have a 2000 Fleetwood Bounder 36s diesel pusher with the 275 HP 5.9L ISB. will this work on my motorhome?
Thank you.
( Marty , 12/18/2017 )
Yes this will work on your RV! ( Support )
( Bob, 10/19/2017 )


This module will increase torque approximately 80-100 ft-lb. It does plug into the fuel pump with one connection and is a set program.

( Support )
I have a 2002 Fleetwood Expedition with the 300hp Cummins, will this product fit my rig?
Engine # 56906131
( Danny Scott, 08/28/2017 )
Yes module is designed to work with your ISB motor. ( Support )
Does the 20300 module increase fuel rail pressure ? ( Tommie arnold, 10/19/2016 )


This module hooks up to the high pressure fuel pump and modulates the signal to increase fuel pressure.

( Support )
What effect does the 20300 have on egt in a motorhome? ( Tommie Arnold, 08/31/2016 )


The 20300 module may increase the EGT's under full load but only by a little bit. An EGT gauge is always a good idea but we don't feel it is absolutely necessary with this module.

( Support )

Ask a question

Note: HTML is not translated!

Write a review

Please login or register to review

 The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

Not Legal for California Use

Shipping Insurance Notice

NOTICE: For orders outside of United States

If you are placing an order to ship outside the United States, Shipping Insurance will be required and added automatically at checkout.


  • $668.25
  • $495.00

Available Options