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K&N 63-2578 Air Intake

63 Series Aircharger Kits > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.8 out of 5 stars   6 Customer Reviews
  • Guaranteed horsepower gain
  • Designed to improve throttle response and engine sound
  • Free-flowing high density polyethylene tube
  • Great looking and light weight carbon fiber heat shield
  • K&N Million Mile Limited Warranty
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
The K&N 63-2578 Air Intake fits some Ford Mustang GT models. See vehicle applications link for details.
The K&N AirCharger 63-2500 air intake system replaces the restrictive factory air filter and air intake housing in some Ford Mustang GT models. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your Mustang’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 63-2500 air intake comes with a K&N high-flow air filter and a light-weight carbon fiber heat shield lid that directs cooler 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 using commonly available tools. 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 Gain20.27 HP @ 5400 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 MaterialStainless Steel
Clamp StyleRegular
Clamps Included5
Couplers Included2
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
Product Box Height14.5 in (368 mm)
Product Box Length24.1 in (612 mm)
Product Box Width15.5 in (394 mm)
Product Style63 Series Aircharger Kits
Replacement FilterRF-1048
Street Legal In All US States No
TUV Approved (Europe)No
Weight10.1 lb (4.6 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 63-2578 Air Intake Product Reviews

Wednesday, March 29, 2017 - Part 63-2578
The EVAP line connection is a little tight and would fit better on an angle connection. I was missing one star washer for the top of the air box, otherwise it looks great and it boosted my Mustang's performance as expected.

Jerry Peters
Inver Grove Heights, Minnesota
Monday, July 18, 2016 - Part 63-2578
Nothing but good experiences with K&N performance parts over the years. Keep up the good work.

Marc Davis
Hiram, Ohio
Monday, January 18, 2016 - Part 63-2578
Great performance and a huge difference on my car.

Bonita Springs, Florida
Friday, August 21, 2015 - Part 63-2578
Just had a K&N series 63 aircharger high performance intake installed by professionals at Paradigm Automotive and Performance (Brainard, MN) and tuned using stock ECU on a 2014 Mustang GT. They did multiple dyno runs and the final result was a max power increase from 336.3 HP at 5300 RPMs to 380.9 HP at 5350 RPMs. The max torque went from 368.5 ft-lbs at 4400 rpm to 422.6 ft-lbs at 4300 rpm. Very impressive and didn't have to invest in an after-market tuner. Also got a printout vs. a guesstimate on HP. Heck of a deal.

Guy Wold
Cass Lake, Minnesota
Wednesday, March 25, 2015 - Part 63-2578
Very pleased with my new K&N intake! Gave my Mustang the sound I was looking for and it looks great. Easy to install and shipping was fast. Highly recommended!!

William Gessler
Harshaw, Wisconsin
Wednesday, November 6, 2013 - Part 63-2578
I was very impressed with the ease of ordering on the website and how fast my item was shipped. My Performance Intake Kit has added so much horsepower to my 2013 Mustang Gt and I am so happy with my purchase, I did not think it would make such a difference but it really made my car that much faster.

Dawn Galati
Wyandotte, Michigan