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K&N pioneered the performance air filter market in 1969 with an oiled cotton air filter design and currently offers an unthinkable amount of air filters in many air filter sizes

Whether it's sitting down in your favorite chair, lying down in bed after a long day's work, or finally getting your project car running oh-so-smoothly, that feeling of just right brings peace and satisfaction. It can be hard, sometimes, to find an air filter for your vehicle that's just right when your air filter needs are outside the norm. It can seem like an insurmountable task if you have space limitations under the hood, performance goals you don't want to inhibit, aesthetics you don't want to compromise or stringent standards of engine protection. Thankfully, your just right woes are over. K&N has a ton of performance air filter sizes that will deliver superior airflow, and superior performance.

K&N air filters were born in the dirt. In 1969, Ken Johnson and Norm McDonald were tired of disposable air filters for their off-road motorcycles constantly getting plugged up. Thus, they embarked on a journey to develop a washable, reusable air filter that would help their motorcycles perform better. Over the last 45+ years, Ken and Norm's design has been refined and proven to be a simple performance add-on that helps to minimize restriction, increase performance, and provide excellent air filtration efficiency.

These days, the most common style of air filter is a flat panel in various air filter sizes and K&N replacement air filters are designed to be installed in the factory air box just like the old filter

At the core of a K&N air filter is its premium oiled cotton gauze air filter media. 4-6 layers of cotton are layered, slightly offset from one another, pleated between wire mesh for rigidity, and impregnated with K&N's air filter oil. Cotton breathes better than paper and the oil acts as a tacking agent, turning cotton strands into microscopic dirt-catching fingers. Other air filter manufacturers may use cotton, some use oil, and most use a pleated design. But K&N brought these design elements together in a way that has made it a leader in aftermarket performance air filters.

These days, the most common style of air filter is a flat panel type. K&N performance replacement panel air filters are designed to be installed in a factory style air box. They have a durable urethane sealing lip that gets compressed between the top and bottom of the air box, providing an airtight seal. If you want to retain the factory look under the hood but don't want to compromise performance with a disposable paper air filter, find a K&N flat panel air filter for your vehicle using the Search By Vehicle tool.

K&N's many air filter sizes of round air filters are popular for hot rodders who put these air filters between a lid and base on top of a carburetor or similarly-styled throttle body

Round air filters are another popular style of performance air filter. Most times, these air filters are fit between a lid and bottom tray on top of a carburetor or similarly-styled throttle body. Hot rodders and classic car lovers should look to K&N for many air filter sizes to meet their needs. Available in many diameters and heights, from short and wide to tall and skinny, K&N has a round air filter for you. Browse K&N round air filters, using the K&N Search by Dimension Round Air Filter tool.

K&N clamp-on air filters have applications & air filter sizes as varied as colors in the paint aisle and are usually secured to an intake tube, or carburetor inlet, using a hose clamp

K&N round straight clamp-on air filters have applications and air filter sizes as varied as colors in a home improvement store paint aisle. These air filters are designed to be secured to an intake tube, or carburetor inlet, using a hose clamp. K&N universal air filters are quite popular with modern fuel-injected or forced-induction applications due to the variety of air filter sizes. The flange of these filters can be stretched up to 1/16" (1.5mm) to fit in-between sizes. Find a round clamp-on air filter with the flange diameter, filter outside diameter and length you need with the K&N Search by Dimension Round Straight Universal Air Filter tool.

Round tapered clamp-on air filters are just like their round straight clamp-on cousins, except that they taper in diameter along their length from the base to the end cap. This adds a sleek visual appeal and allows many air filter sizes to fit in smaller spaces where a round straight clamp-on may not fit. Many round straight and round tapered clamp-on filters are also available in air filter sizes with chrome end caps for sharper styling. Find a round-tapered clamp-on air filter to fit your needs here with the K&N Search by Dimension Round Tapered Universal Air Filter tool.

K&N oiled cotton performance replacement and universal air filters are washable and reusable. Depending on driving conditions, and air filter sizes, remove the filter from the vehicle from time-to-time and service it using a K&N Recharger Kit with it's easy-to-follow step-by-step instructions. Whether your vehicle travels over-the-road or off-road, a K&N air filter can help it perform better by allowing your engine to breathe easier. K&N backs its air filters with excellent warranties that match their excellent design. Air filters for passenger vehicles and factory over-the-road applications are backed by a 10-year/million mile limited warranty, and those for universal, off-road or custom applications are warranted against defective materials or workmanship for one year from date of purchase with no mileage limitation.

K&N also offers air filters in the following styles and air filter sizes:

• Oval straight clamp-on
• Oval tapered clamp-on
• Dual-flange oval straight
• Dual-flange oval tapered
• Oval
• Tapered conical
• Rectangular
• Triangle
• Parallelogram
• Trapezoidal and more!

Find the K&N performance replacement air filter, or universal air filter, in many air filter sizes that's just right for your application at KNFilters.com.

Download the standard screen version of the K&N November 2015 calendar page with the Poison Spyder Customs 2005 Wrangler TJ Unlimited named Daddy Longlegs and model Nikki Brisson

K&N's November 2015 calendar page showcases local Southern California Inland Empire talent in the way of Banning, California based Poison Spyder Customs and Yucaipa, California native Nikki Brisson. Poison Spyder Customs is owned by a band of hardcore wheelers, not a marketing company. Owner Larry McRae, and his family, live within and contribute to the Off Road Nation, rather than living on and taking from it. In fact, the Poison Spyder Customs built Daddy Longlegs 2005 Jeep Wrangler TJ Unlimited is Larry's personal trail rig, in addition to being a show display vehicle and R&D mule.

Download the wide screen version of the K&N November 2015 calendar page with the Poison Spyder Customs 2005 Wrangler TJ Unlimited named Daddy Longlegs and model Nikki Brisson

Daddy Longlegs' feature characteristics are that it is long, low and wide, with a Low Center Of Gravity (LCOG) for great off-road performance. Larry says it's one of the best climbing and rock crawling Jeeps he has driven. Several Poison Spyder Customs signature products on Daddy Longlegs are the Crusher Corners and Rocker Knockers designed specifically for the 4" wheelbase stretch, and the "highline" DeFender XC's up front.

Additional K&N calendar desktop wallpaper images are available to download on the Free K&N Racing Wallpaper for Computer Desktops page. Printed versions of the 2016 K&N calendar will soon be available for pre-order on KNFilters.com.

The 1st annual OPTIMA Ultimate Film Festival presented by K&N Air Filters will take place Thursday, November 5, 2015 during the annual SEMA trade show week in Las Vegas, Nevada

The first annual OPTIMA Ultimate Film Festival presented by K&N Air Filters will be taking place Thursday, November 5, 2015 during the annual Specialty Equipment Market Association (SEMA) trade show week in Las Vegas, Nevada. The OPTIMA Ultimate Film Festival presented by K&N air filters challenged enthusiasts from all across the country to submit their most exciting and powerful performance automotive content for two categories: Short Film and Action Cam.

Films chosen as finalists will be shown at an exclusive screening event during the 2015 SEMA Show on Thursday, November 5, 2015, from 7:00 to 10:00 p.m. at the House of Blues at Mandalay Bay in Las Vegas, Nevada. David Freiburger of The Enthusiast Network’s automotive adventure show, Roadkill, will host this dynamic event. OPTIMA Ultimate Film Festival presented by K&N Air Filters attendees will be using Wedgies.com text-to-vote technology to determine the winners.

Tickets are limited and can be obtained at OPTIMA Alley or at the OPTIMA Batteries booth #22755 in the Las Vegas Convention Center during the 2015 SEMA show. Doors at The Courtyard at House of Blues, Mandalay Bay will open at 7:00 p.m. and VIPs must arrive by 7:30 p.m. to preserve their VIP status. The program will begin at 8:00 p.m. sharp and will conclude at 10:00 p.m. For more information including rules, how to enter, and more, visit http://www.OPTIMAfilmfest.com.

The Mystik Lubricants TerraCross Championship’s Women’s Class will end the season with a Halloween shootout at Polaris Camp RZR in the Glamis sand dunes on October 29-31, 2015

The Mystik Lubricants TerraCross Championship’s Women’s Class will close out the season with a Halloween shootout in the dunes at Polaris Camp RZR in Glamis, California on October 29-31, 2015. The TerraCross Championship features the best of off-road and action sport athletes competing on rough, tough and muddy courses complete with obstacles such as rocks, logs, crossover jumps and tight turns. With events televised on CBS Sports, spec Polaris RZR XP 1000 vehicles, and top athletes from diverse racing backgrounds, TerraCross has become one of the premier racing series in the world.

The Women’s class is the fastest growing field in TerraCross and the ladies will descend on Polaris Camp RZR to decide the 2015 Mystik Lubricants TerraCross Women’s Championship. For the first time ever, Saturday Night TerraCross is racing under the lights. Musco lighting will light up the TerraCross track for night-time CBS Sports TV racing.  Polaris Camp RZR in Glamis, California is the pinnacle of the 2015 Mystic Lubricants TerraCross Championship series. Key partners, including Walker Evans Racing, Pro Armor, Fox Shocks, and PRP Seats will be on site. Polaris Camp RZR will feature a full set of racing for the Women’s class, with the champion being crowned under the lights.

Shelby Anderson, Danielle Weatherby, and K&N air filters’ Katie Vernola are within 6 points of one another and are poised to strike at the #1 spot in the TerraCross Women’s Championship

Sarah Price, riding for Optimas Starters and IMG Motor Sports, holds a commanding lead atop the 2015 TerraCross Women’s Championship points race. One Source/Walker Evans Racing’s Shelby Anderson, SuperATV.com/GMH Motorsports’ Danielle Weatherby, and K&N air filters’ Katie Vernola are within 6 points of one another and are poised to strike at the #1 spot. Ami Houde, riding for Pro Armor rounds out the top five. The women’s class features some of the top athletes from the world of powersports. Catch the hottest racing on the track as the Mystik Lubricant’s TerraCross Women’s Championship is decided at Polaris Camp RZR.

The racing action will kick off at Polaris Camp RZR Glamis located at the Glamis Beach Store from Thursday, October 29, 2015 - Saturday, October 31, 2015. This is a free Event. Racing will start immediately on Saturday night after the over-the-top giveaway of four Polaris RZR XP ® Turbos to lucky fans. Racing times are as follows: Thursday, October 29, 2015 from 4:00pm - 6:00pm PST practice and seeding; Friday, October 30, 2015 from 1:00pm - 2:30pm PST and 4:30pm - 6:00pm PST; and Saturday, October 31, 2015 from 9:30am - 11:00am PST and 8:00pm - 9:30pm PST.

A highly customized 1967 Chevy Camaro with a twin turbo Chevy LS3 engine and built by East Bay Muscle Cars will be featured in the K&N Filters’ 2015 SEMA Show Booth #22561

Body modifications to this ’67 Camaro include a custom front valance and front fenders with EBMC air induction to aid engine cooling and provide fresh air to a pair of K&N air filters

East Bay Muscle Cars, in Brentwood, California, is dedicated to producing only the highest quality, trend setting custom builds with a special focus on the Pro-Touring market segment. For those that don’t know, the Pro-Touring style takes classic American muscle cars and modifies them with enhanced suspension components, braking, drivetrain, and aesthetics. Pro-Touring cars embrace classic American automotive styling and infuse these timeless machines with the performance and amenities of new muscle or even super cars.

East Bay Muscle Cars’ clean, modern facility and enthusiasm for the cars they build have set them apart and earned them praise within in the industry. East Bay Muscle Cars was named Hot Rod Magazine Top Ten Trendsetter at 2012 SEMA show and they continue to be a leader in cutting edge design and technology. East Bay Muscle Cars, or EBMC for short, will be bringing an exquisite example of a Pro-Touring inspired 1967 Chevy Camaro, nicknamed Snowblind after the PPG Honda White paint, to the 2015 Specialty Equipment Market Association (SEMA) show in Las Vegas, Nevada.

At first glance Snowblind looks like one of many 1967 Camaro restomods that can be seen across the country. However, EBMC believes that the parts you don’t see are just as important as the parts you do see. Snowblind is a perfect example of this statement, because after a closer look it becomes apparent this isn’t the average customized 1967 Camaro. Essentially, the only part of this car that is factory Chevrolet is the car’s unibody platform. Both the front and rear subframes have been swapped out for Art Morrison units including a triangulated 4-link 9” Ford live-axle housing.

Hidden under the carbon fiber heat extractor hood of this 1967 Chevy Camaro named Snowblind is a Turnkey Engine Supply Chevy LS3 engine with twin turbochargers & intercoolers

A custom fabricated rear valance, custom integrated rear spoiler, and custom built rear bumper tidy up the backside of this 1967 Chevy Camaro built by EBMC and named Snowblind

Body modifications include a Custom fabricated front valance and front fenders with EBMC air induction to aid engine cooling and provide fresh air to a pair of K&N air filters. Very little of the stock 1967 Camaro body was left untouched. EMBC even re-contoured the A-pillars and drip rails, as well as lowered the rear quarter panels down 2” towards wheel openings for a sleeker look. A custom fabricated rear valance, custom integrated rear spoiler, and custom built rear bumper tidy up Snowblind’s backside. EBMC installed 1968 Chevy Camaro doors to eliminate the factory vent wing windows. Even more modifications are hidden under the carbon fiber heat extractor hood.

Pop the hood and a Turnkey Engine Supply Chevy LS3 engine with twin turbochargers will stare you in the face. Additional performance mods under the hood include EBMC custom Stainless steel headers, EBMC induction system and water to air intercoolers. East Bay Muscle Cars left no stone unturned when it came to Snowblind. Mounted to the custom carbon fiber inner wheel wells are EBMC fabricated power steering fluid and coolant reservoirs. You won’t find any junk in the truck at the other end of the car. Under the deck lid with integrated spoiler, hides DSE minitubs to allow 325 mm wide rear tires.

Power is transferred from the massive twin turbo LS3 via a T56 Magnum transmission and ram dual disc clutch connected to an Inland Empire Driveline custom 3.5” aluminum driveshaft. Forward thrust meets the pavement via Rushforth wheels. Wrapping the 18x10 fronts, and 19x12 rears, are 285/35-18 and 325/30-19 Nitto Tires. Because the faster a car goes, the more power it needs to stop, EBMC installed Wilwood 14” slotted and vented brake rotors in the front and rear of Snowblind. 6-piston front and 4-piston rear, Superlight calipers paired with a Wilwood pedal assembly provides the clamping force needed to slow this ‘67 Camaro to a complete stop.

The inside of the 1967 Camaro called Snowblind has been modernized with a custom East Bay Muscle Cars 3D printed instrument cluster housing Dakota Digital VHX gauges

Come see the East Bay Muscle Cars Snowblind 1967 Chevy Camaro featured in the K&N Air Filters 2015 SEMA show booth, number 22561, or keep an eye out for it on an autocross track

The inside of Snowblind is equally modernized with modified Corbeau seats wrapped in leather as well as microsuede and an EBMC seat belt harness bar to keep occupants in place. A custom EBMC 3D printed instrument cluster houses Dakota Digital VHX gauges and all the interior panels have been modified for a more precise fit. Additional interior modifications include a custom built center console, short pile carpet and LED lighting.

The East Bay Muscle Cars Snowblind 1967 Chevy Camaro will be featured in the K&N Air Filters 2015 SEMA show booth, number 22561. Do not miss the opportunity to come see this work of automotive art up close and in person at the K&N SEMA show booth. But if you can’t make it, don’t fret. Snowblind can be spotted competing in Autocross races, including those put on by the Ultimate Street Car Association (USCA).