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K&N 77-2577KTK Air Intake

Intake Kits > Performance Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7 out of 5 stars   6 Customer Reviews
  • 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
The K&N 77-2577KTK Air Intake fits some Ford F250 Super Duty, and Ford F350 Super Duty models. See vehicle applications link for details.
The K&N 77-2577KTK high-flow performance air intake system is a free-flowing, mandrel-bent aluminum tube air induction system designed to fit some Ford F350 Super Duty 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 77-2577KTK air intake comes with a chrome topped K&N high-flow air filter and a heat shield that installs onto the lower air box. Air is directed through the intake tube into the engine’s throttle body for a guaranteed power gain. The intake tube has an attractive textured black powder-coat finish that's made to last and it accommodates the factory mass air sensor. 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 some wrenches. 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]

Product Specifications

Estimated Horsepower Gain13.93 HP @ 4077 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-269-38
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included5
Couplers Included2
Intake Pipe Color / FinishTextured Black
Intake Pipe MaterialAluminum
Product Box Height10.5 in (267 mm)
Product Box Length35.5 in (902 mm)
Product Box Width13.25 in (337 mm)
Product Style77 Series Kits
Replacement FilterRC-5173
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight12.2 lb (5.5 kg)
Horsepower gains based on similar vehicle dynamometer test. Results will vary.

K&N 77-2577KTK Air Intake Product Reviews

Wednesday, February 15, 2017 - Part 77-2577KTK
Yes, the customer loved the cold air intake. Would suggest to anyone trying to gain more horsepower.

Todd Van Dolah
Littleton, Colorado
Thursday, August 11, 2016 - Part 77-2577KTK
Very nice fit, easy to install and I like the sound it makes.

Luke Stewart
Oxford, Iowa
Friday, July 8, 2016 - Part 77-2577KTK
Instantly noticed more power and throttle response. Over time towing, interstate and around town driving, I had dramatic fuel mileage gains. Only downside is the noise when towing 9000 pounds uphill. Very loud.

Brandon Rutherford
Berea, Kentucky
Friday, August 28, 2015 - Part 77-2577KTK
The performance actually one up but the sound at 3000 RPMs is incredible in my truck

Mark Stitzel
Wednesday, April 1, 2015 - Part 77-2577KTK
Raised my fuel mileage by 4 mpg even in the city and I don''t baby it at all. Still have to see what highway mileage boost will be. Easy to order and easy to install. 2 r Thumbs up with 5 stars.

Tulsa, OK
Monday, November 10, 2014 - Part 77-2577KTK
I can already see the increase of power. Should have dotten soomer. I haqve been running a K&N filter in the stock breather,

Jon Cattabriga
enfield nh