Best Kn Performance Breather Filters in 2026

Proven protection for up to 10,000 miles

Engineered for use with conventional or synthetic motor oil

A special blend of fibers and resin creates a proprietary filter media that captures 95% of dirt particles that can cause harmful engine wear

EASY INSTALLATION: Engine oil filter comes with Suregrip non-slip surface making it easy to remove and implement your filter without slippery mess ups. Perfect for the DIYer like yourself, just screw new filter on until gasket reaches base contact and tighten.

DURABLE DUAL LAYER: Compare to standard oil filters, FRAM Ultra Synthetic provides 99%+ filtration efficiency with pleated media that entraps all kinds of dirt and exhaust for a cleaner output.

SUPERIOR ENGINE PROTECTION: FRAM car oil filter is composed of a slick silicone anti-drainback valve, delivering superior start-up engine protection with up to 3X the hot oil resistance. Keep your filter clean without the dangerous mess.

For all valve covers with 1-1/4 inch filler-breather holes

OEM replacement grommets

Designed for use with OE specifications for fit and function

ENGINEERED POWER: State-of-the-art filtration media provides up to 50% more airflow than disposable paper filters to increase power and acceleration. Clogged or dirty air filters can reduce your vehicle’s acceleration by up to 10%.

EASY INSTALLATION: Pre-oiled and built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.

SAVES MONEY: K&N high-flow replacement air filters will save you $250 over 10 years by avoiding disposable filters.

Extensive R&D

Precision built

Proven performance

CRANKCASE FILTER - if your crankcase breather filter element overhead console displays a message or the mileage has been 67,500 miles apart or your vehicle leaks oil, high idle speed, engine performance declines, etc., a failed crankcase filter might be the problem, it's time to make a replacement.

COMPATIBLE WITH FOLLOWING VEHICLES - Any Vehicle Using Cummins 6.7L ISB Engine | 2007.5-2020 Ram 2500 3500 4500 5500| 2011-2020 Ford F550 F650| 2008-2017 Freightliner MB Line MC Line XC Modular Rail 6.7L & other vehicles with a 6.7-litre ISB engine Freightliner M2 106 | 13-17 Freightliner S2C | 12-15 Freightliner XB Line | 11-17 Freightliner XC Lowered Rail | 12-17 Freightliner 108SD | 11-20 Ford 450 550 | Please see below for more

REPLACES PART NUMBER: CV52001 904-418 904418 4936636 68002433AC 68002433AB Please check the part numbers whether it suits your vehicle before purchasing.

REPLACEMENT Crankcase Ventilation Filter -restores drivability.

FITMENT - Any Vehicle Using The Cummins 6.7L ISB Engine . 2008-2021 Dodge Ram 2500 3500 4500 5500 , 2008-2015 Ford F650 / F750 , 2008-2018 Blue Bird All American FE/RE, 2008-2018 Blue Bird Vision School Bus, 2012-2017 Freightliner 108SD, 2008-2019 Freightliner B2, 2008-2009 Freightliner Cargo/M2, 2008-2013 Freightliner M2 106, 2008-2017 Freightliner MB Line/MC Line, 2011-2014 Freightliner MCL, 2008-2018 Freightliner MT45, 2008-2017 Freightliner MT55.

REPLACES# CV52001 , 68002433AA 68002433AB 68002433AC , 4936636 , 904-418

【Direct Replacement】: If your crankcase breather filter element overhead console displays a message or the mileage has been 67,500 miles apart, it is recommended that you replace it in time. The crankcase breathing filter element meets or exceeds the oem standard, has passed the factory test, and is perfectly matched with the original car, and can be installed directly.

【High Quality】: Made of reinforced high-quality material with oil resistance and high heat resistance, long service life. It can effectively remove oil vapor to protect the normal operation of the engine, reduce wear and tear, avoid blockage, improve engine life, and provide you with long-term stable and excellent performance

【Fit For】: All vehicles equipped with 6.7L Diesel Cummins Engines | Dodge Ram 2007.5-2020 2500 3500 4500 5500 | 08-09 Freightliner Cargo/M2 | 08-17 Freightliner XC Straight Rail/XC Modular Rail/MT55/MB Line/MC Line | 08-18  Freightliner XB Straight Rail/XC Raised Rail/MT45 | 08-19 Freightliner B2 | 08-13 Freightliner M2 106 | 13-17 Freightliner S2C | 12-15 Freightliner XB Line | 11-17 Freightliner XC Lowered Rail | 12-17 Freightliner 108SD | 11-20 Ford 450 550 | Please see below for more

14" X 4" Recessed Base Super Flow Washable Air Cleaner

Chrome steel recessed base trim

Fits 4 barrel carburetor with 5 1/8" opening

【Fitment】 * Fit For Harley performance filter M8 engine , 2017-up Touring / Bagger - FLHT / FLHR / FLHX / FLTR ; 2018-up Softail/street bob air cleaner Models .

【Features】* The Filters are re-usable and do not require oil; just rinse and re-use. Exposed Filter Design that Enhance High-Volume Air Flow , Backing Plate Promotes Smooth Airflow into Carburetor/Throttle body

【Advantages】* Inverted Series Forged billet Aluminum CNC Cut Air Cleaner Breather Intake Filters Kits Fit for Harley Davidson Motorcycles , The Unique Design air filter housings feature built-in velocity stacks that scream performance and enhance looks.

【Perfect substitute】 The air filter is a perfect replacement for those outdated intake system, give your car a new life.

【More air】 Help with more air flowing into the engine machine to improve throttle response and enhance horsepower.

【increase power】 The filter will improve overall air filtration, horse power, torque and gas mileage over stock filters.

【REPLACEMENT】If your vehicle leaks oil, high idle speed, engine performance declines, etc., a failed crankcase filter might be the problem. This Cummins breather filter element is manufactured to the OE specification to provide factory-fresh appearance and direct-fit, exactly OEM design to replace your defective filter.

【LONG LIFE-SPAN】Long life-span matters, that is why the housing of our cummins ventilation filter is crafted from reinforce material, features high resistance against temperatures and better durability, meanwhile effectively remove oil vapor and restore good driving performance.

【REPLACES#】CV50628, 904-7902, 5263190. Please make sure the part number before purchase! The Cummins crankcase filter has been tested to ensure trouble-free installation and performance.

【REPLACEMENT】If your vehicle leaks oil, high idle speed, engine performance declines, etc., a failed crankcase filter might be the problem. This ISX15 crankcase breather is manufactured to the OE specification to provide factory-fresh appearance and direct-fit, exactly OEM design to replace your defective filter

【LONG LIFE-SPAN】Long life-span matters, that is why the housing of our cummins ventilation filter is crafted from reinforce material, features high resistance against temperatures and better durability, meanwhile effectively remove oil vapor and restore good driving performance

【REPLACES#】904-7904, 99340, CB57, 3685528, CV50617, CV50634, CV50633. Please make sure the part number before purchase! The Kenworth crankcase element has been tested to ensure trouble-free installation and performance

Package Dimensions: 6.35 H x 14.478 L x 9.652 W (centimetres)

Package Weight: 0.25 pounds

Fit type: Vehicle Specific

【Fitment】 * Fits 1991-up Sportster 883 / 1200 with CV Carb or Delphi EFI with Original Equipment throttle body.

【In The Box】 * Includes all mounting hardware ,gaskets and Installation instructions .

【Warranty】 * If the air filter cover is discolored or the filter element is damaged within 6 months, Contact us to get replacement for free !

【Fitment】 * For 2016-2017 Dyna FXDLS and Softail , 2008-2016 FLT Touring / Bagger - FLHT / FLHR / FLHX / FLTR / H-D FL Trike models with Original Equipment 50mm Throttle Body.

【In The Box】 * Includes all mounting hardware ,gaskets and Installation instructions .

【Warranty】 * If the air filter cover is discolored or the filter element is damaged within 6 months, Contact us to get replacement for free !

weideer 100% Brand New, High Performance Air Filter

Mounting Hole Dia:12mm/ 0.47",Size:50 x 58mm/1.96 x 2.28in

Function:The car air cleaner is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air, ensures that enough clean air enters the cylinder.

【High Performance】: These Air Intake Filter Pod provides more air flow than the original bulky air box to increase bike's power and acceleration. Catch impurities in air to prolong the engine Life.

【Wild Fitment】: The 54mm Universal Clamp-On Breather can fit for motorcycle, scooter, minibike, ATV (Please check the size before buying).

【Durable Material】: Mtsooning Motorcycle Air Filter Cone built with high quality materials and ruber, features a durable urethane frame.

【Fitment】 * Fit For Harley Milwaukee-Eight M8 Engine , 2017-up Touring / Bagger - FLHT / FLHR / FLHX / FLTR ; 2018-up Softail Models .

【In The Box】 * Includes all mounting hardware ,gaskets and Installation instructions .

【Warranty】 * If the air filter cover is discolored or the filter element is damaged within 6 months, Contact us to get replacement for free !

Feature a one-piece aluminum backing plate/carb support bracket

APPLICABLE GEARBOX TYPES: MT/manual gearboxes are available in red, blue, silver and black. Inner Diameter: Approx. 13mm/0.5". Outer Diameter: Approx. 50mm/2 inches. Applicable gearbox type: MT/manual gearbox.

EXCELLENT FUNCTION: The car air filter can increase the intake air flow, filter the impurities in the air, make the engine breathe more smoothly, prevent the dust suspended in the air from being sucked into the cylinder, and reduce the wear of the piston group and the cylinder.

UNIQUE DESIGN: The unique shape reduces the intake resistance of the engine and improves the intake volume and volumetric efficiency per unit time when the engine is running. Before installing in the carburetor or intake pipe, filter dust and sand from the air to ensure enough clean air enters the cylinder.

FITMENT—fit for go kart engine mini bike predator 212cc 196cc 6.5hp 7HP GX160 GX200 Baja Warrior MB200 Coleman CT200U BT200X KT196 CT200U-ex RB200.

HIGH PERFORMANCE—it's predator 212cc air filter jet kit.The air filter will improve overall air filtration and can filter out dust and dirt, so that let the carburetor to produce more horsepower and smooth running.

UNIQUE DESIGN AND EASY TO INSTALL —the air filter breather not only has a unique and novel design, but also helps with more air flowing into the engine machine. And it is very easy to install and high efficiency.

🚗12mm breather filters with chrome plated  top plates and shields for beauty and durability improve air induction efficiency drastically by curt

🚗Designed to reduce the resistance of the engine air intake and improve per unit time air intake and volumetric efficiency when engine running and increase engine power and torque output

🚗Easy to install: bolt on the machine directly. Washing the air filter to keep it clean could be reusable

Mounting Hole Dia: 12mm/ 0.47",Size:50 x 58mm/1.96 x 2.28in

Function: The car air cleaner is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air, ensures that enough clean air enters the cylinder.

Easy to use: Easy to install, the universal air filter can be secured tightly onto your vehicle pipe, and you can adjust to required size with flat head screwdriver.

【Perfect Substitute】 The air filter is a perfect replacement for those outdated intake system, give your car a new life.

【More Air】 Help with more air flowing into the engine machine to improve throttle response and enhance horsepower.

【Increase Power】 The filter will improve overall air filtration, horse power, torque and gas mileage over stock filters.

【Small to fit】Mounting hole diameter 12mm / 0.47 inch. Small body is easy to be installed, just bolt on the machine directly, then it will work

【Easy installation】Built with simple clamp-on design. One of the easiest and most cost-effective upgrades for your vehicle for quick performance gains.

【Universal fit】If your connector outer diameter is 12mm will fit, adjustable with clamp.

Inner diameter: 12mm. Replacement high performance air filter, universal fits for Predator 212cc Coleman CT200U CT200U-EX BT200X Baja Warrior MB200 GX200 196cc 6.5 hp mini bike,motorcycle, ATV, go kart and so on

Double-layer screen,stop 99% of dirt particles for more air flowing into the engine, the breather filter increases horsepower and torque for maximum

Simple clamp-on models in black and chrome finishes. Easy to install. Bolt the valve cover breather on directly to the machine for work

Crankcase Breather filter w/ chrome cap - 1.5" (38mm) inlet i.D.

Real horsepower only from vibrant

Excellent quality as you would expect from vibrant

【Replacement Part Number】 - #FL-2077 FL2070. Before ordering, please confirm compatibility and weather are suitable for your vehicle!

【Compatible Vehicle】 - This Crankcase Ventilation Filter Engine Breather Element Separator compatible with 2016-2019 Ford F650 F750 6.7L V8 DIESEL.

【High Quality】 - Our Engine Oil Filter Separator made of high-performance material that are completely corrosion-resistant, wear-resistant, heat-resistant, strong impact resistance, and good overall performance. It’s equivalent parts fully comply with the original manufacturer's specifications and functions.

🌈 【High Quality】High quality hydraulic air filter kit, made of high quality material, durable and long life.

🌈 【Lightweight】Hydraulic breather filter has light weight, reasonable structure, beautiful and novel design, and stable filtration performance.

🌈【Function】Hydraulic tank cap can keep the air flow inside and outside the fuel tank, preventing dust in the outside air from mixing into the fuel tank.