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K&N Air Filters

K&N air filters from Rude Racing

K&N Replacement Panel Filters

K&N 57i Air Induction Kits

K&N 57S Air Induction Kits

K&N 57i Generation 2 Air Induction Kits

K&N Panel FiltersK&N 57i Induction KitsK&N 57s Induction KitsK&N 57i Generation 2 Induction Kits

 K&N Apollo Air Induction Kits

K&N Typhoon Air Induction Kits

K&N Air Filter Cleaner Kit

Other Brands of Air Filter

K&N Apollo Induction KitsK&N Typhoon Induction KitsK&N Cleaner KitsK&N Search

Already know the K&N part number you're looking for? enter it in the 'Keyword' search (top left of this page).


K&N Air Filters

What's wrong with a standard filter?
Standard air filters are usually made from paper which will eventually clog and deteriorate over time. Car manufacturers like using paper filters because they are cheap to make.

old filter

What's so good about K&N's filtration?
K&N air filters are designed to achieve high, virtually unrestricted air flow whilst maintaining excellent filtration levels. The secret to their success lies in the unique high flow media, which consists of 4-6 sheets of oiled cotton gauze layered between aluminium mesh. The result is an air filter which allows dramatically more air into the engine. K&N filters are washable and reusable, and will protect your engine for the life of your vehicle.
K&N Close up

 Power Graph

Better performance!
Think about this - no motor sport vehicle ever uses a standard type paper air filter - they use a performance filter of some description. A K&N air filter will allow dramatically more air into the engine than a factory standard air filter. More air provides more oxygen for combustion, which gives greater efficiency and more power.


K&N Direct Replacement Panel Filters

This is a quick and simple modification which makes a lot of sense. Unlike OE paper filters a K&N replacement can be cleaned and re-used over and over. It will perform better than a standard filter and save you money in the long run. A replacement K&N panel filter simply fits in place of the original one in the standard air box.

Removing OE filter
Fitting K&N Panel

Removing an OE paper air filter

Fitting a K&N replacement panel filter


What happens to my vehicle's warranty?
Nothing. Although a K&N replacement filter element is not a factory fitted item there is no reason why you can't fit one in place of the original item and it will not affect your vehicles warranty.

How can a K&N save me money?
Because K&N filter elements are washable & reusable they will never need to be replaced. Cleaning is simple and can be carried out by the owner using a K&N cleaner kit.

save money

Will a K&N replacement filter element affect noise?

Unlike most Induction kits, a replacement panel filter has absolutely no affect on noise levels.

treeAre K&N air filters environmentally friendly?
Million of ordinary disposable paper air filters end up in landfills or incinerators every year. K&N air filters never need to be replaced.  They are made from cotton, a renewable resource (unlike the trees from which paper is made that take years to grow).

How do I fit a K&N panel filter element?
Generally speaking it is simply a case of opening the air-box and swapping over the filter element inside. On most cars this is a 2 minute job!


K&N 57i Air Induction Kits

Why replace the factory standard air-box?
Standard air filters along with their housings are designed to perform a satisfactory filtering job whilst keeping noise levels down. Ideal for most car drivers - but not if you're interested in performance! Getting rid of the air box and replacing the standard paper filter for a cone filter, not only looks great but performs much better.

A typical K&N 57i kit

How does a K&N 57i induction kit improve performance?
You'll have seen cone filters used on thousands of race cars. They're there for a reason! A cone filter allows far greater volumes of air flow into the engine. More air provides more oxygen for combustion, which gives greater efficiency and more power.

How will a K&N 57i induction kit affect noise?
A 57i kit will create an awesome induction ‘roar' when you apply full throttle. In general driving there will be no discernable difference in noise level compared to a standard air box - It's only there when you put your foot down! Factory standard air boxes are designed to muffle this sound. That's fine for most car drivers, but as a performance enthusiast you'll crave the induction sound that you get when the throttle's wide open!

How does a K&N 57i noise compare to other induction kits?
A K&N cone filter will tend to be slightly louder than a foam element filter. It'll give a good ‘roar' on full throttle. The exact noise level will depend upon the engine and the amount of sound insulation under the bonnet of your car.

How do I fit a K&N 57i Induction kit?
Fitting varies from car to car. In most cases the job can be carried out in around 30 minutes using ordinary DIY tools. K&N Induction kits always include all the fittings necessary for installation. Step-by-step fitting instructions are included with every K&N Induction kit.


K&N 57i Generation 2 Air Induction Kits

About the K&N 57i Generation 2
The K&N 57i Generation 2 range of air induction kits features a non-metallic rotationally moulded air tube that reduces air inlet temperature and decrease intake sound over a metal tube. They are aerodynamically engineered to drive a massive amount of airflow into the engine, which translates into more power.
A typical K&N Generation 2 kit 

Restriction can exist between an air filter and the engine. It can be the weakest link in the airflow chain, and rob a vehicle of its natural horsepower. Most induction kits cannot avoid this. The K&N 57i Generation 2 kit is different however - it virtually eliminates air path restriction by replacing the air filter and the entire air path completely.

K&N have engineered the Generation 2 to be far superior to the ordinary K&N 57i in terms of power gains, fitting and in looks.

What does a 57i Generation 2 sound like?
Just like an ordinary 57i induction kit the Generation 2 has an exposed cone and so will give you that fantastic induction 'roar' when you apply full throttle. In general driving there will be no discernable difference in noise level compared to a standard air box - It's only there when you put your foot down! Because of its non-metallic air tube, a Generation 2 kit will not generally be as noisy as a K&N Typhoon kit.

How do I fit a K&N 57i Generation 2 Induction kit?
Fitting a Generation 2 kit is a little more involved than an ordinary induction kit because it includes the induction pipe as well. K&N provide very good step-by-step fitting instructions with pictures for every Generation 2 kit - so you can't go wrong! In most cases the job can be carried out in around an hour using ordinary DIY tools. K&N Generation 2 Induction kits always include all the fittings necessary for installation.


K&N 57S Air Induction Kits

What is a K&N 57S kit?
The K&N 57S performance kit is a special air intake systems developed by K&N to increase horsepower and acceleration by dramatically increase air flow over the original factory design. The K&N 57S completely replaces the factory air box and air filter with upgraded high quality components. It uses a large cone filter, fully enclosed in an air box assembly with a removable lid for easy access when cleaning is required.
A typical K&N 57s Kit 
The 57S air box is injection moulded for extra strength and houses an oversized conical K&N high flow air filter. By reducing both air filter and air box restriction, the 57S provides up to three times the power gains available with a K&N replacement air filter alone. The weakest link in the airflow 'chain' robs a vehicle of its natural horsepower. Often that weak point is the factory air box itself - a problem which K&N has solved with the 57S.

K&N 57s Diagram More Horsepower
K&N will not make a 57S system that does not provide a measured increase in horsepower and torque. Each system is proven to increase vehicle power at the wheels on a dyno. These thoroughly engineered systems provide huge increases in power that you should feel when you accelerate.
Typical gains on a 4 cylinder vehicle range between 4 and 7 BHP, but K&N have tested engines that provide as much as 11 extra BHP.

Easy Installation
The K&N 57S kit is easy to install. A typical installation can be done with a screwdriver, pliers and spanners in 30 minutes. That's because K&N have specifically engineer the kits to use factory holes and mounting points so they do not require any cutting or drilling. The 57S air box is factory pre assembled and custom designed for each application to fit right into the engine compartment.

57S Induction Noise
The K&N 57S air box is similar to the OE air box in terms of noise suppression. In operation the 57S produces a very slight increase in noise levels at full throttle. Depending on the sound insulation around the engine bay, this may not be noticeable from the driver's seat. When compared to a K&N 57i induction kit you will notice that the 57S is much quieter.

More about the K&N 57S
57S performance air boxes are injection moulded from the same materials used for OE air boxes. Once installed, you will have a high performance system that almost looks factory standard. K&N 57S kits come pre assembles and have a removable lid to make servicing the washable air filter simple. Inside the 57S is the largest conical shaped high-flow air filter which K&N could fit into the system while still using factory holes and mounting points.
 
K&N 57s kit 3 
This extra filter size provides even more airflow with lower restrictions than a standard K&N OE replacement filter. The oversize air filter also captures and holds more dirt - increasing the service life (up to 100,000 miles!). The air box assembly is connected to the engine with adapters made from high strength materials such as silicon and reinforced nylon to ensure a long life. K&N 57s kit 4 


K&N Apollo Air Induction Kits

About the K&N Apollo
The Apollo cold air induction systems incorporate a washable/reusable K&N high-flow air filter enclosed within a protective shell. It is available with bespoke fittings for many applications and also as a universal fitting kit. The Apollo completely replaces the standard air filter and housing with a new sealed air system which takes cool air from outside the engine bay feeding it directly to the engine via a large K&N cone shaped air filter.
A typical K&N Typhoon kit 
This design smoothes out air flow and delivers cooler air to the engine resulting in improved power and torque.

Apollo Induction Noise
The Apollo's shell encloses the K&N air filter and so suppresses the induction noise a little. In practice the Apollo still give an induction 'roar' on full throttle, but not as loud as a K&N 57i, which has an exposed cone filter. Of course, the exact noise level will vary from car to car.


K&N Typhoon Air Induction Kits

What is a Typhoon induction kit?
K&N's Typhoon kits aren't just designed to perform, but they're an impressive feature of the engine bay too - ideal for any show car. The mandrel bent aluminium induction pipe is designed to smooth out air flow and reduce air restrictions - providing more air to the engine. Each kit is proven on a dyno to increase BHP and torque.
 
A typical K&N Typhoon 

Typhoon kits are available in a range of powder coated colours and polished aluminium.  They come with an oversized high-flow conical air filter designed to provide increased surface area and dust capacity. This extra surface area provides even more airflow at lower restriction than a standard K&N OE replacement panel filter that is limited to the size of the factory air box. The oversize air filter also captures more dirt increasing the service life before a cleaning is required - up to 100,000 miles!

What does a K&N Typhoon kit sound like?
Typhoon kits have an exposed cone and so will give you a fantastic induction 'roar' when you apply full throttle. During normal driving - on part throttle it will sound similar to a standard air box. The induction noise only appears when you put your foot down.

How do I fit a Typhoon Induction kit?
K&N provide very good step-by-step fitting instructions for each Typhoon kit.  In most cases the job can be carried out in around an hour using ordinary DIY tools. K&N Typhoon induction kits always include all the fittings necessary for installation.


Cleaning Your K&N Air filter

This procedure applies to all types of K&N (Panel filter elements, 57i kits, Generation 2 kits...)

Step-1
FOLLOW ALL SAFETY INSTRUCTIONS ON THE K&N AIR FILTER CLEANER BOTTLE. Spray K&N Air Filter Cleaner onto both sides of the air filter until it completely saturates the pleated material.
 A.  Apply K&N Air Filter Cleaner to clean side of filter
 B.  Apply K&N Air Filter Cleaner to dirty side of filter
 Cleaning K&N filter

Allow cleaner to soak into both sides of air filter for 10 minutes to loosen the dirt. Do not let cleaner dry on air filter.
CAUTION: THE USE OF ANY OTHER CLEANING SOLUTION OR METHOD COULD DAMAGE THE FILTER!


Step-2
Rinse off air filter with cool low-pressure water. Allow gravity to flush dirt out of air filter by applying water to the clean side of the filter; up and down the length of the pleats.
Continue to rinse the filter until all traces of cleaner are gone. If the filter is extremely dirty it may be necessary to repeat steps 1 and 2. If there are spots of dirt remaining on the filter, spray each spot directly with cleaner, allow a few minutes for it to soak and repeat rinsing step.
Rinsing K&N air filter 


Step-3
After rinsing, gently shake off excess water and allow filter to dry naturally.  Do not proceed to the oiling step until the filter is completely dry. 
CAUTION: THE USE OF ANY OTHER DRYING METHODS (I.E. COMPRESSED AIR, DRYER HEATERS, HEAT GUNS) COULD DAMAGE FILTER.


Step-4
RECOMMENDATION: FOR BEST RESULTS USE K&N AIR FILTER OIL.
Apply K&N Air Filter Oil liberally to the dirty side of the filter only. This will allow for a visual reference of complete coverage.
If using a K&N squeeze bottle, squeeze bead of oil along the crown of each pleat using the lip on the squeeze bottle tip as a guide. Utilize graduated view strip on bottle to dispense proper amount of oil. If using a K&N aerosol spray, spray an even amount of oil along the crown of each pleat.

 
 Oiling K&N Filter
Wait 20 minutes for the oil to be absorbed into the filter media. Inspect the clean side of the filter for any areas that are lighter in colour. Touch up these areas in the media by applying oil to the dirty side of the filter.  Continue oiling procedure until there is an even red colour over the entire surface of the clean and dirty side of filter.


Step-5
Before reinstalling filter back into vehicle, inspect it for damage. Follow any and all specific installation instructions that came with the K&N Air Filter. 
CAUTION: FAILURE TO FOLLOW THE K&N INSTALLATION INSTRUCTIONS COULD LEAD TO AN IMPROPER SEAL RESULTING IN POSSIBLE ENGINE DAMAGE.

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