2 3/4 - 4 Inch Air Filter with Built in Unique Turbine built into the Filter
1. What are the sizes of this air filter? 4 Inch opening diameter with adapters allowing 3.75 and 2.75inches 3. What is included? One air filter with built in turbine fan that is NOT powered and spins freely to create a tornado effect inside your air intake that can possibly increase horsepower over a regular air intake filter. One 4" metal clamp is also provided. Adapters for smaller size intakes. 4. How do I install this on my existing air intake? You must have air pipe that is 3.5-4" in diamter for this to be clamped on. Otherwise, you need a reducer. 5. Will I gain or loose horsepower with this? With the turbine design extra 3.5HP have been tested. Results will vary depending on your vehicle and setup.
Pros: Looks like a good filter. The description was written by someone that doesn't know how filters work.
Cons: I don't know how good the filter is but I would want the air inlet measered in microns not inches.
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