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K&N 63-2581 Air Intake

63 Series Aircharger Kits > Performance Intake Kit
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.8 out of 5 stars   44 Customer Reviews
  • Guaranteed horsepower gain
  • Designed to improve throttle response and engine sound
  • Free-flowing high density polyethylene 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
  • K&N Million Mile Limited Warranty
The K&N AirCharger 63-2581 air intake system replaces your vehicle’s restrictive factory air filter and air intake housing. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your vehicle’s engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine’s RPM range. The 63-2581 air intake comes with a chrome topped K&N high-flow air filter inside a heat shield that mounts to the lower air box. The position of the air filter inside the heat shield helps direct cooler, denser air into the custom molded intake for a guaranteed power gain. The oversized 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 requiring only a screwdriver and several wrenches. This air intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.

[More Information on K&N AirCharger Air Intakes]

Product Specifications

Estimated Horsepower Gain12.05 HP @ 5304 RPM
Air Filter ColorRed
Air Filter Height6 in (152 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialSteel
Clamp StyleRegular
Clamps Included5
Couplers Included2
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Product Box Height12.5 in (318 mm)
Product Box Length22.25 in (565 mm)
Product Box Width14.25 in (362 mm)
Product Style63 Series Aircharger Kits
Replacement FilterRC-5173
Street Legal In All US States No
TUV Approved (Europe)No
Weight10.6 lb (4.8 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 63-2581 Air Intake Product Reviews

See all reviews!
Review part 63-2581
Tuesday, November 17, 2015 - Part 63-2581
Easy to install. Not much gas mileage gain. Git up and go is improved.

Lance Nitschke
North Dakoa
Monday, November 02, 2015 - Part 63-2581
Fantastic fuel mileage increase was outstanding and horse power is crisp and smooth.

Thursday, October 01, 2015 - Part 63-2581
Not sure about the quick disconnect connection but have mechanic friends to ask. Easy install and now I need a different muffler to unplug the exhaust I am getting at least 1 mile more per gallon.

Jim Roe
St. Joseph, Michigan
Sunday, September 27, 2015 - Part 63-2581
Great purchase if you are looking for deeper sound out of your engine and additional horsepower. You will notice it immediately. Have not noticed a increase in MPG but have only had it on for about 2 weeks.

Friday, September 04, 2015 - Part 63-2581
I am not mechanicly inclined and it was extremely easy to install. Sounds great. Extra horsepower is always a good thing

Brian Fry
Saturday, July 18, 2015 - Part 63-2581
I'm very pleased with this product. The moment I installed this intake on my 2012 Ford F-150, I could feel and defiantly hear the difference. My truck sounds like a beast and the gas mileage is significantly better. I'm glad I bought it.

Randy Acosta
Katy, Texas
Thursday, July 16, 2015 - Part 63-2581
Well, I too purchased this for my 2013 F-150 5.0 Coyote engine, it took about 30 mins. to install hardest part was finding a star driver that fir the MAP sensor screws as not tools are sent in the kit Started up my truck and didn't notice anything really... Really quiet, well I washed my hands and decided to take it for a drive and see whats doing. As soon as i backed up and gave it some throttle I heard a nice throaty deep roar I was pleased, and surprised. I turned the corner and jumped on the highway, as soon as I cleared the cars I smashed my pedal down and WOAHHHHHH  NICE My truck proceeded to make a very loud roar picking up speed whilst other drivers all turned their heads to see what the hell was speeding by. Great purchase, I do not know if I gained hp, not a Dyno guy... I did see some improvement in MPG im at 18.4 I was 17.4. Hoever with the new boost in sound I find myself smashing down on the gas A LOT because its fun now so I am sure mpg will vary because of it. Conclusion: If you want your Truck to sound SEXY and can afford $266 bucks? GET IT You will be happy. If you want better mileage? Don't buy this..

Nashua, New Hamshire