K&N performance air filters, K&N elements, K&N 57i induction kits

Universal filter group K&N Universal Clamp-on Filters

K&N Universal air filters are designed and manufactured for a wide variety of applications. Regardless of the angle, offset or diameter of the air intake, there is probably a clamp-on air filter available for your equipment. All filters are constructed with ultra-strong moulded pliable rubber flanges which absorb vibration and allow for secure attachment, and can also be stretched up to 1.5mm (1/16") to fit in-between sizes. Our featured clamp-on air filters are available in round, tapered and oval designs, for just about any special application.

See the K&N fitting guide then choose your style:

K&N Clamp-on filters:


TAPERED	ROUND	OVAL

HOW TO CHOOSE THE CORRECT FILTER:

1. First you need to know the power output (BHP) of your engine - the manufacturers flywheel figure.

2. Select a suitable shape and flange size. Check the filters BHP rating (last column), making sure it is the same or more than the engines BHP. Note: Flanges will stretch up 2mm* or down 3mm.

*Place filter flange in very hot water for 30 seconds

HORIZONTAL FITTING
Very long filters may need some end support particularly if used in off-road events.

FORMULA FOR SIZING MULTIPLE FILTERS
If fitting more than one filter use the following formula -
x2 = BHP x 1.6
x3 = BHP x 1.85
x4 = BHP x 2.2

Example using round straight clamp-on filter RU-0600:
RU-0600 x 1 = 125 BHP
RU-0600 x 2 = 200 BHP
RU-0600 x 3 = 230 BHP
RU-0600 x 4 = 275 BHP

NOTES ON TURBOCHARGERS AND SUPERCHARGERS
Because Turbo's and Superchargers do not rely on atmospheric pressure but rather forced induction, lower rated filters can be used.
As a rough guide you can normally increase the quoted BHP figure by 80% (more as boost pressures increase).
So the RU-0600 in the example above will easily cope with a BHP of 225 in a vehicle with a turbo.

Always use the standard sized filter where practical and the largest possible filter when used in dusty off-road conditions.