If you are towing heavy loads, using a downloader/programmer, or running modified injectors, then the 2003-2007.5 5.9L Cummins Quadzilla Boost Fooler is a MUST-HAVE PRODUCT!

While 5.9L Cummins programmers can definitely improve performance, there are still things they cannot do to allow you to gain optimal power and efficiency out of your engine. The 2003-2007.5 Dodge 5.9L Cummins Quadzilla 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 temperatures.

The Quadzilla Boost Fooler is also a great enhancement for a stock 5.9L Cummins truck that hauls heavy loads and needs exhaust temperature reduction. Even on a stock truck, you can easily gain 5-8 psi 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. 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 note 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 10 hp on a stock truck up to 50 hp 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 1998.5-2004 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 1998-2004 trucks should generate 18-23 psi 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.

The 2004.5-2007 5.9L Cummins uses an electronic wastegate that is operated off the MAP sensor. In this instance, no modifications to your turbo will be necessary. Stock 2004.5-2007 trucks typically spike up to 32 psi of boost pressure. With the Boost Fooler, you will see up to 40 psi of boost on a stock truck and up to 48 psi of boost on heavily fueled trucks.

Compatible with:

*May not work for all builds due to other engine/vehicle modifications