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Bully Dog RFI Cold Air Intake for 1994-2007 Dodge Cummins 5.9L
Bully Dog RFI Intake for the Dodge Cummins 5.9L
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MSRP: $369.99
Special Sale Price: $369.99

Product Code: 52100

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The Bully Dog Rapid Flow Induction system is a fully enclosed air intake system. This design is very effective at  keeping hot air out of the engine. The RFI cold air intake draws cold air in from sources around the engine bay resulting in an improvement in performance and efficiency. With extensive testing, Bully Dog designed an enclosed air intake system along with a high flow cotton gauze filter that yields better air flow and colder intake temperatures than a stock system and other aftermarket open intake designs. 

Available Vehicle Applications:
  • 1994-2002 Dodge Cummins 5.9L
  • 2003-2007 Dodge Cummins 5.9L
  • 10% Greater Air Flow At 60 mph in cruise control*
  • 10 degree lower intake temps at 60 mph in cruise control*
  • 10-15 added rear wheel horsepower*
  • 10-30 added rear wheel ft.-lbs. of torque*
*Mustang Dynamometer used to measure horsepower and torque results.
Results vs. stock air intake system.

  • Maximize Air Filter Cleaning Area
    • By using a conical air filter you can maximize the air filter cleaning area and allow the engine to breath easier giving you more horsepower.
  • Lifetime Reusable Gauze Filter
    • All RFI Induction systems use a lifetime reusable four layer cotton gauze filter that features an inverted cone design on the end of the filter. This unique design creates a greater surface area of filter media that enables it to trap dust particles as small as 0.50 micron.
  • Ideal for Performance Use
    • A greater surface area of filter media, combined with the RFI's deep pleat design, makes this filter ideal for high performance use.
  • Easy Installation
    • The installation of these systems is extremely easy and requires only basic hand tools.
  • Compatible
    • The Rapid Flow Induction works exceptionally well in conjunction with performance modules. The modules increase the amount of fuel going into the motor and create a need for increased air flow to lower exhaust temperatures. The end result is improved driveability, fuel mileage (improvement will vary), and acceleration.
  • Featured Design
    • The design of the air box draws cold air in, resulting in better performance.


Click here for the 1994-2002 Dodge Cummins 5.9L User Manual (Adobe PDF)

Click here for the 2003-2007 Dodge Cummins 5.9L User Manual (Adobe PDF)

Please wait for the user manual files to download. The RFI Pre-Filters and Cleaning Kits are optional items sold separately.


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Cold Air Intakes