K&N 57S-4000 Performance Air Intake System

The K&N 57S-4000 57i Generation II Induction Kit uses a non-metallic rotationally molded tube to reduce air temperature for improved performance.
The K&N 57S-4000 Performance Airbox replaces the restrictive factory air filter and air box lid. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your 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 57S-4000 Performance Airbox comes with an oversized conical K&N high-flow air filter and an injection molded air box lid with the K&N logo embossed on top. The air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This performance air box is relatively easy to install into the air box base with commonly available tools. K&N builds these air box systems to last for the life of your vehicle and they are backed by K&N's Million Mile Limited Warranty. Some K&N 57S Series Performance Airboxes are compliant with the latest TUV emissions and sound regulations. Check the K&N catalog or website for vehicle applications and specific TUV status for each vehicle and air intake.

K&N 57-1554 Performance Air Intake System

K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower up to 16HP: Compatible with 1.6L, L4, 2007-2018 FORD/VOLVO/MAZDA (C-Max, Focus, Grand, Transit)57S-4000 : Automotive

K&N, Performance air intake system 57-2556

K&N 57S-4000 Performance Filter // Airbox Ford Focus XerroR

The K&N 57-1571 FIPK air intake system replaces the restrictive factory air filter and air intake housing on specific RAM 1500 pickup truck models. K&N air intakes are designed to dramatically reduce air intake restriction as well as smooth and straighten air flow. This allows your 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.

K N 57-1571 Ram 1500 Performance Air Intake System

K&N Performance Air Intake System

The K&N 57S-4000 Performance Airbox replaces the restrictive factory air filter and air box lid. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your 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.

K&N 57S-4000 Performance Intake Kit

The K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. A fully enclosed injection molded air box connects to the factory air intake hose.

K&N 57S-6200 Performance Air Intake System Mercedes-Benz

The KN 57-1133 cold air intake system replaces the factory air filter and air intake housing in many Polaris Ranger RZR models for a guaranteed increase in horsepower and torque. A free-flowing aluminum intake tube helps increase the volume of airflow to your engine. The system is paired with a washable, reusable High-Flow Air Filter featuring oiled cotton filter media, which is protected by a foam wrap and an enclosed filter housing for additional protection from heat and the elements.

K&N 57-1133 - 14-19 Polaris RZR 1000 999cc Performance Intake Kit

VOLKSWAGEN 1.6/2.0TDi ENCLOSED AIRBOX

Cold Air Intake - High-flow, Roto-mold Tube -VOLKSWAGEN 1.6/2.0TDi ENCLOSED AIRBO

K&N Performance Air Intake Multiple Fitments (57S-4000) –

The K&N 57-3070 FIPK performance air intake system replaces the restrictive OEM air filter and air intake. K&N intakes are guaranteed to product more horsepower for your engine because they are designed to straighten and smooth the intake air flow. Utilizing a massive high-flow K&N air filter and a free-flowing, high density polyethylene tube, your engine inhales a larger amount of air than the factory air filter assembly.

K&N 57-3070 Performance Intake Kit