XDP EPC Solenoid Fooler Plug | XD345
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XDP EPC Solenoid Fooler Plug



Model #XD345

Shopper Award

Increase the durability, line pressure, and performance of the Allison transmission in your 2011-2019 GM 6.6L Duramax LML and L5P with the XDP EPC Solenoid Fooler Plug XD345. From the factory, the function of the EPC solenoid is to increase line pressure during shifts up to 230 PSI and once the shift is complete, drop the pressure back down to 80 PSI.

At 80 PSI your Allison can't hold the added stress of aftermarket upgrades or even towing a heavy load. The XD345 installs on the EPC Solenoid and installs back into the valve body allowing your transmission to effectively operate at 230 PSI all the time.

The line pressure increase helps to eliminate clutch slippage, poor shifting performance, and it extends transmission life. The EPC Fooler Plug is easy to install and does not require valve body or transmission removal. This product is an excellent modifications for any upgraded LML or L5P truck.


  • Easy Installation
  • Increased Line Pressure
  • Can Increase Transmission Longevity
  • Enhances Transmission Performance
Application Note:
  • The XD345 should not be used in conjunction with transmission tuning or other pressure adding modifications.
Warranty Info:

Products manufactured by XDP carry a 1-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to one (1) year from the date of sale and limited solely to the parts contained within the product's kit.

Proposition 65

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Vehicle Engine Notes
Chevrolet Silverado 2500

Chevrolet Silverado 3500

GMC Sierra

Who XDP?

XDP or Xtreme Diesel Performance is a company that was established in 2002. The company started as Jersey Rebuilding Service, where they provide fuel injection servicing, turbocharging, and electrical systems for the diesel industry. Today, the company has established itself as the leading expert in delivering aftermarket diesel performance products.

Your Diesel Performance Experts

Their mission is to provide their customers with high-quality products that would help enhance their vehicles' efficiency, functionality, and performance. As a one-stop-shop for diesel power, they can provide their customers with parts that look good and could perform.

A Brand You Can Trust

For more than 20 years, the company has used its experience to create the best products that raised the bar for manufacturing quality parts. They cater to most vehicle brands and models, such as those from GM, Ford, and Dodge, and have the most extensive inventory of diesel performance products in the market.

Purchase XDP Products At Vivid Racing

If improving your diesel vehicle is your goal, then upgrade it with parts from XDP. The company is a dominant force when it comes to diesel parts for decades and is trusted by various professionals and enthusiasts everywhere. They have the best selection of parts readily available on their shelf, giving you the best products at an affordable price. To know more about XDP and what they can offer, visit Vivid Racing and check out their list of products that fit your requirement.

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