Quadzilla DBSTF98 Boost Fooler

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For 1998.5-2000 Dodge 5.9L Cummins

The Quadzilla DBSTF98 Boost Fooler is a must have on your 1998.5-2000 Dodge 5.9L Cummins. If you tow heavy loads, are using a downloader or programmer or running modified injectors, the Quadzilla Boost Fooler will help you get the most of out of your truck. While programmers can definitely improve performance, there are still things that they cannot do to allow you to gain optimal power and efficiency out of your engine. The Boost Fooler will allow you to increase turbo boost to compensate for the added fueling modifications you have made. Enabling your turbo to produce more boost will increase overall horsepower and torque and lower your exhaust gas temperatures.
The Boost Fooler is also a great enhancement for a stock truck that hauls heavy loads and needs exhaust temperature reduction. Even on a stock truck you can easily gain 5-8psi of boost pressure to help cool your EGTs. You will also see a slight improvement in peak horsepower. The Quadzilla Boost Fooler uses a specialized high impedance circuit to allow you to make more turbo boost without setting any ECU error codes. The Boost Fooler is 100% weatherproof and designed for simple under-the-hood installation.
You will be able to make as much turbo boost as possible with your fueling modifications. It is important to notice that the stock turbos do have some limitations. If you desire extreme levels of turbo boost, you may need a larger, aftermarket turbocharger. Horsepower gains will vary from 10hp on a stock truck up to 50hp on heavily modified trucks. EGT reductions will vary from 75°F on a stock truck and up to 300°F on heavily modified trucks.
On 1998.5-2002 5.9L Cummins you will need to physically modify your wastegate to gain more turbo boost. Doing this without the Boost Fooler will result in check engine lights and codes set into the computer. Stock 1998.5-2002 trucks should generate 18-23psi of boost pressure stock (depending on year model). With the Boost Fooler you will be able to run 35+ psi of boost depending on your fueling enhancements.


  • Eliminates Overboost Codes
  • Lower Exhaust Gas Temperatures
  • Easy-To-Install - Plug & Play Installation
Note: You can confirm fitment by checking the plug on your map sensor. The 1998.5-2000 models will have a round MAP plug.

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