K&N 77-2573KP

Intake Kits > Performance Intake Kit
List Price: $629.10
Your Price: USD $346.99

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The K&N 77-2573KP high-flow performance air intake system is a free-flowing, mandrel-bent aluminum tube air induction system designed to fit some Ford Explorer models. The restrictive factory air filter and air intake housing on your vehicle are replaced by this K&N air intake system which is designed to dramatically reduce air flow restriction as it smoothes and straightens air flow. The improved air flow allows your engine to inhale a larger amount of air than it would from the stock air intake. More air means more usable power and acceleration throughout your engine’s RPM range. The 77-2573KP air intake comes with a chrome topped K&N high-flow air filter and a heat shield that installs into the previous air box space. Air is directed through the intake tube into the engine’s throttle body for a guaranteed power gain. The intake tube has an attractive chrome-like finish that's made to last and it accommodates the factory mass air sensor and a replacement silicone crank case vent hose and brake booster vent hose. The oversized cone shaped air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This air intake is relatively easy to install usually in 90 minutes or less using existing factory mounting points. The tools needed are a screwdriver, ratchet set and an Allen wrench. Some K&N 77 series air intakes are not legal for sale or use in California and other states adopting California emission standards while others are CARB exempt and 50 state legal. Check the K&N catalog or website for vehicle applications and specific CARB status for each vehicle and air intake.

[More Information on K&N 77 Series Air Intake Systems]
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Free-flowing aluminum tube
  • Replaces entire factory air intake system
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
  • Washable and reusable lifetime air filter
  • K&N Million Mile Limited Warranty

Product Specifications

Estimated Horsepower Gain10 HP @ 4700 RPM
Air Filter ColorRed
Air Filter Height6 in (152 mm)
Air Filter Large End Diameter7.5 in (191 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
CARB EO NumberD-269-37
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included5
Couplers Included2
Intake Pipe Color / FinishPolished
Intake Pipe MaterialAluminum
Product Box Height12.5 in (318 mm)
Product Box Length18.25 in (464 mm)
Product Box Width18.25 in (464 mm)
Product Style77 Series Kits
Replacement FilterRF-1048
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight12.2 lb (5.6 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

Customer Feedback

Be the first to review part 77-2573KP
This little fuel filter does make a big difference in how the flow of fuel passes and cleans the fuel to improve the burning efficiency. I always replace the fuel filter on my 2001 ford explorer sport and this time I decided to get this one from K&N. I have always known that the air filters from K&N are far superior that the conventional ones, but I was not aware they also make fuel filters and oil filters. I highly recommend this product to anyone looking to keep their auto running more than what they were intended to.

Chris Romero
Houston, Texas
The K&N cold air intake kit is great on my 2005 Ford Explorer. I ordered the kit about 2 years ago. I pull a heavy trailer. The explorer is barely big enough to pull it. Installing this kit is a BIG help in letting the engine breathe. It sounds great and makes me feel better too, putting this load on my car. The installation was straight forward and the instructions were excellent. The installation was no problem. Only 2 minor issues. The airflow sensor mounting pad had a casting lap that deformed the mounting surface. I was able to smooth it out with a sharp knife and light sanding. The other issue was that I mounted the filter such that it was riding hard on the bottom of the intake box. This was my fault. I didn't find out until I took the filter off to clean and re-oil it and found a very small worn spot on the filter. When I install this new filter I will make sure that the filter is free from interference all around. Thanks for a great product I'll be using K&N from here on out.

Phil Kirby
Simply the BEST on the market. I have used them in all of my vehicles. They are easy to install and you will immediately notice a boost in power and a small improvement in the gas mileage. Easy to clean and very durable. Spend the extra money and try one in your car or truck. You will save that money the first year in gasoline. I have them in my 2014 Mustang V6 Coupe and my 2013 Ford Explorer XLT V6.

Stuart Hill
Deming, New Mexico