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52500 - AG Diesel RV Power Module ISC 8.3L / ISL 8.9L Common Rail (2008-2009)

On SALE! 52500 -  AG Diesel RV Power Module ISC 8.3L / ISL 8.9L Common Rail (2008-2009)


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  • 2008-2009 Cummins ISC 8.3L
  • 2008-2009 Cummins ISL 8.9L


The 52500 Performance Module fits 2008-2009 model year 8.3L ISC and 8.9L ISL engines. This module does not flash or connect directly to your ECM. It plugs into the engine harness and intercepts signals going back and forth between the fuel injectors and the ECM. It uses factory spec connectors and does not require any splicing or modifications to your engine harness. This diesel performance module is designed for optimizing the fuel delivery system to extract more power from your engine with up to 30% increase in horsepower and torque and 10-20% increase in fuel economy. Adjustable with a four position switch, Stock, +10%, +20%, & +30% power. The module doesn't flash the ECM, instead it receives the data from the ECM, optimizes the signal to the engine improving the fuel efficiency and power. Best of all, this module comes with a Lifetime Warranty.
The RV Edition module will increase your power up to 30% over stock while delivering 10-20% better fuel economy. How is this possible you ask? The programming in the module is self-adjusting based on load and will deliver more power when needed but better fuel economy when not needing it.

The module receives the data from the ECM and optimizes 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 module into your existing factory connectors.


I recently purchased and installed a 12500 for my 2008 8.3 Cummins (in Class A RV; Freightliner chassis). Performance improvement is measureable and I am initially satisfied.
I also purchased and installed the additional cable to mount the rotary control switch on the dash.
I would like a prefabricated label to install on the dash (with the rotary switch) to identify its purpose as well as the switch positions so that the switch position can be identified at a glance.
Please advise if you have such a label available for the switch.
( Rick B, 06/17/2021 )
We do not have a label for that, you might check directly with AG Diesel Solutions to see if they have anything. ( Support )
8.9 2008 Cummins ISL Has a DpF filter.

Do you have a compatible module?

Engine Serial Number 46798340 Vehicle ID Number 1RF43464782047318
( Myron Truex, 10/03/2019 )

This would be the module specified to work for your model: https://www.ultrarvproducts.com/8210104-TS-Performance-MPHD-Cummins-8.3L-ISC-8.9L-ISL-2008-Current

Although this Area Diesel module says 2009+, I do believe the 2008 models are the same and it should work.

( Support )

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 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

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  • Views: 11329
  • Brand: AG Diesel
  • Product Code: 52500
  • Availability: 2
  • $700.65
  • $519.00

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