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Air Intake Kit

Bully Dog - Rapid Flow(TM) Cold Air Induction Intake (52201)

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  1. 2015 Ram 2500 Lone Star 5.7L V8 cid:345
  2. 2015 Ram 2500 Tradesman 5.7L V8 cid:345
  3. 2015 Ram 1500 Sport 5.7L V8 cid:345
  4. 2015 Ram 1500 Special Service 5.7L V8 cid:345
  5. 2015 Ram 1500 SLT 5.7L V8 cid:345
  6. 2015 Ram 1500 Rebel 5.7L V8 cid:345
  7. 2015 Ram 1500 Outdoorsman 5.7L V8 cid:345
  8. 2015 Ram 1500 Lone Star 5.7L V8 cid:345
  9. 2015 Ram 1500 Limited 5.7L V8 cid:345
  10. 2015 Ram 2500 ST 5.7L V8 cid:345
  11. 2015 Ram 2500 SLT 5.7L V8 cid:345
  12. 2015 Ram 2500 Outdoorsman 5.7L V8 cid:345
  13. 2015 Ram 1500 ST 5.7L V8 cid:345
  14. 2015 Ram 2500 Laramie Longhorn 5.7L V8 cid:345
  15. 2015 Ram 2500 Laramie Limited 5.7L V8 cid:345
  16. 2015 Ram 2500 Laramie 5.7L V8 cid:345
  17. 2015 Ram 2500 Big Horn 5.7L V8 cid:345
  18. 2015 Ram 1500 Tradesman 5.7L V8 cid:345
  19. 2015 Ram 1500 Laramie Longhorn 5.7L V8 cid:345
  20. 2015 Ram 1500 Laramie Limited 5.7L V8 cid:345
  21. 2015 Ram 1500 Laramie 5.7L V8 cid:345
  22. 2015 Ram 1500 Express 5.7L V8 cid:345
  23. 2015 Ram 1500 Big Horn 5.7L V8 cid:345
  24. 2015 Ram 3500 5.7L V8 cid:345
  25. 2015 Ram 1500 SXT 5.7L V8 cid:345
  26. 2014 Ram 1500 Lone Star 5.7L V8 cid:345
  27. 2014 Ram 1500 SXT 5.7L V8 cid:345
  28. 2014 Ram 3500 5.7L V8 cid:345
  29. 2014 Ram 2500 Tradesman 5.7L V8 cid:345
  30. 2014 Ram 2500 ST 5.7L V8 cid:345
  31. 2014 Ram 2500 ST 5.7L V8 cid:345
  32. 2014 Ram 2500 SLT 5.7L V8 cid:345
  33. 2014 Ram 2500 SLT 5.7L V8 cid:345
  34. 2014 Ram 2500 Outdoorsman 5.7L V8 cid:345
  35. 2014 Ram 2500 Lone Star 5.7L V8 cid:345
  36. 2014 Ram 2500 Laramie Longhorn 5.7L V8 cid:345
  37. 2014 Ram 2500 Laramie Limited 5.7L V8 cid:345
  38. 2014 Ram 2500 Laramie 5.7L V8 cid:345
  39. 2014 Ram 2500 Big Horn 5.7L V8 cid:345
  40. 2014 Ram 1500 Tradesman 5.7L V8 cid:345
  41. 2014 Ram 1500 ST 5.7L V8 cid:345
  42. 2014 Ram 1500 Sport 5.7L V8 cid:345
  43. 2014 Ram 1500 Special Service 5.7L V8 cid:345
  44. 2014 Ram 1500 Big Horn 5.7L V8 cid:345
  45. 2014 Ram 1500 Express 5.7L V8 cid:345
  46. 2014 Ram 1500 Laramie 5.7L V8 cid:345
  47. 2014 Ram 1500 SLT 5.7L V8 cid:345
  48. 2014 Ram 1500 Laramie Limited 5.7L V8 cid:345
  49. 2014 Ram 1500 Laramie Longhorn 5.7L V8 cid:345
  50. 2014 Ram 1500 Outdoorsman 5.7L V8 cid:345
  51. 2013 Ram 1500 Big Horn 5.7L V8 cid:345
  52. 2013 Ram 1500 Sport 5.7L V8 cid:345
  53. 2013 Ram 1500 Tradesman 5.7L V8 cid:345
  54. 2013 Ram 1500 SXT 5.7L V8 cid:345
  55. 2013 Ram 1500 ST 5.7L V8 cid:345
  56. 2013 Ram 3500 5.7L V8 cid:345
  57. 2013 Ram 1500 SLT 5.7L V8 cid:345
  58. 2013 Ram 1500 R/T 5.7L V8 cid:345
  59. 2013 Ram 1500 Outdoorsman 5.7L V8 cid:345
  60. 2013 Ram 1500 Laramie 5.7L V8 cid:345
  61. 2013 Ram 1500 Express 5.7L V8 cid:345
  62. 2013 Ram 2500 5.7L V8 cid:345
  63. 2013 Ram 1500 Laramie Longhorn 5.7L V8 cid:345
  64. 2012 Ram 1500 5.7L V8 cid:345
  65. 2012 Ram 3500 ST 5.7L V8 cid:345
  66. 2012 Ram 3500 SLT 5.7L V8 cid:345
  67. 2012 Ram 3500 Laramie 5.7L V8 cid:345
  68. 2012 Ram 2500 ST 5.7L V8 cid:345
  69. 2012 Ram 2500 Power Wagon 5.7L V8 cid:345
  70. 2012 Ram 2500 Outdoorsman 5.7L V8 cid:345
  71. 2012 Ram 2500 Laramie Longhorn 5.7L V8 cid:345
  72. 2012 Ram 2500 Laramie 5.7L V8 cid:345
  73. 2012 Ram 2500 SLT 5.7L V8 cid:345
  74. 2011 Ram 3500 SLT 5.7L V8 cid:345
  75. 2011 Ram 3500 ST 5.7L V8 cid:345
  76. 2011 Ram 3500 SXT 5.7L V8 cid:345
  77. 2011 Ram 2500 Outdoorsman 5.7L V8 cid:345
  78. 2011 Ram 2500 Laramie Longhorn 5.7L V8 cid:345
  79. 2011 Ram 2500 Laramie 5.7L V8 cid:345
  80. 2011 Ram 1500 5.7L V8 cid:345
  81. 2011 Ram 3500 Laramie 5.7L V8 cid:345
  82. 2011 Ram 2500 SLT 5.7L V8 cid:345
  83. 2011 Ram 2500 ST 5.7L V8 cid:345
  84. 2011 Ram 2500 SXT 5.7L V8 cid:345
  85. 2011 Ram 2500 Power Wagon 5.7L V8 cid:345
  86. 2010 Dodge Ram 2500 TRX 5.7L V8 cid:345
  87. 2010 Dodge Ram 2500 ST 5.7L V8 cid:345
  88. 2010 Dodge Ram 2500 SLT 5.7L V8 cid:345
  89. 2010 Dodge Ram 2500 Laramie 5.7L V8 cid:345
  90. 2010 Dodge Ram 1500 5.7L V8 cid:345
  91. 2010 Dodge Ram 2500 SXT 5.7L V8 cid:345
  92. 2010 Dodge Ram 2500 Power Wagon 5.7L V8 cid:345
  93. 2009 Dodge Ram 2500 SXT 5.7L V8 cid:345
  94. 2009 Dodge Ram 2500 ST 5.7L V8 cid:345
  95. 2009 Dodge Ram 2500 SLT 5.7L V8 cid:345
  96. 2009 Dodge Ram 2500 Power Wagon 5.7L V8 cid:345
  97. 2009 Dodge Ram 2500 Laramie 5.7L V8 cid:345
  98. 2009 Dodge Ram 1500 5.7L V8 cid:345
  99. 2009 Dodge Ram 3500 5.7L V8 cid:345
  100. show all...
Authorized Dealer
white carb warning, not legal street use in California Not for sale or street use in California.

About this product

Part #: 52201

The RFI is an advanced airflow induction built to increase the engine's ability to breath. By replacing the restrictive stock induction, RFI increases horsepower, torque, fuel efficiency, and decreases exhaust gas temperatures. By removing the stock air box, replacing it with a metal heat shield, and using a conical air filter you can maximize the air filter cleaning area and allow the engine to breathe easier and produce more horsepower. All RFI inductions use a lifetime reusable 4 inch layer cotton gauze filter. This design, combined with deep pleats, make these filters ideal for high performance use.

More Details

See what our community says about bully-dog products

product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
I first began researching this product because the stock setting for my speed limiter was 20 mph lower than the car's drag limited top speed, which bothered me out on empty, desert highways. When I looked into different tuners, this one claimed a decent increase in power and torque while not affecting fuel economy or actually increasing it. The reviews affirmed these claims and reassured me that the tune would not fry my ECU. I also like how this product can advance my vehicle's timing to its most efficient level (2 degrees) at the cost of emissions increasing.
Is this your first time buying from this brand? Did you consider other brands?
Yes. Other brands were either too risky for my car's ECU or too expensive for the benefits they delivered.
Was it easy to install? Any installation tips that will help others?
This product plugs directly into the OBD2 port of my vehicle. For power, there is a USB cord so you can bring a laptop in the car when you want to tune. Permanent powering is harder because you would have to drill through the dashboard to the fuse box and splice in the wires. I chose not to do this because I only need it for periodic tuning so I just take the product out when I'm done.
Once you've had a chance to use the product, did it meet your expectations?
Good bang for the buck. Increased top speed from 110-130 mph, increased HP from 175-200 (not dyno tested), and increased torque to the extent that I do notice a difference. WOT acceleration is also enabled under 40 mph, which can be fun with the paddle shifter.
View on Jake's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Ease of use, information guages
Is this your first time buying from this brand? Did you consider other brands?
Yes
Was it easy to install? Any installation tips that will help others?
Very easy
Once you've had a chance to use the product, did it meet your expectations?
It was very fun
Any additional comments?
Use only as a guage. No longer a tuner
View on Levi's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

Benefits of adding this mod

A factory air intake system compromises your performance with restrictive tubing and low quality paper air filters. Upgrading to a wide breathing cold air intake optimized for delivering cooler, more dense air to your engine is the least expensive way to boost power and increase your fuel mileage. Take it a step further with our selection of forced induction turbos or superchargers to maximize your motor’s performance and breathe new life into your custom build.

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we ship worldwide!

Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

+ FREE GROUND SHIPPING ON U.S. ORDERS OVER $99
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Have a question? Ask an Expert!

Finding the best parts can be tricky

- but not to worry! Our team of experienced American Muscle, JDM, Euro, and off-road tuners are ready to answer your questions (as long as we’re not in the garage wrenching on our own builds).

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Wheelwell helps you organize all your stuff for your car, I’ve loaded all my cars on Wheelwell and you can see all the parts I’ve put in them and that may help you make a decision with your own build.

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Matt Farah

Smoking Tire / The Drive

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Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

James M.

Ford Focus ST

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Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

Wallace R

Chevrolet Silverado 1500