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In 1969, K&N introduced the reusable, high-flow cotton gauze air filter initially designed for racing, but they soon found their way into countless street cars and motorcycles

What Does a Cold Air Intake Do?

In 1969, K&N introduced the reusable, high-flow cotton gauze air filter. This revolutionary performance air filter was initially designed for racing, but soon found its way onto countless street cars and custom built hotrods. By the late 80's, fuel injection was becoming the industry standard, so K&N introduced the idea of bolt-on performance air intakes. Like its first high-flow air filter, its new cold air intake systems were proven to significantly increase horsepower and torque, and they quickly became the gold standard for custom car builders, off-roaders, racers, and performance enthusiasts across the globe.

Today, K&N cold air intake systems are the go-to performance upgrade for anybody wanting to increased horsepower and torque from their vehicle’s engine. These bolt-on performance kits are easy to install, and the reusable cotton gauze air filters are warrantied for 10 years or one million miles. But let's look at how they work.

How a Cold Air Intake System Works

Most vehicle manufacturers equip vehicles with a maze of sound baffling, turbulence causing flexible hosing, and usually a restrictive factory air filter box

The best way to explain a cold air intake system is to think of your car's engine like a pair of lungs. In order to make power, the cylinders have to inhale air to create the explosion that produces wheel-turning horsepower and torque. Since cold air contains more oxygen molecules than warm air, injecting a higher volume of oxygen-rich air into the cylinders allows the engine to burn fuel more completely during the combustion cycle. This "combustion efficiency" results in an increase of horsepower and torque, using roughly the same amount of fuel.

Put simply, if you add oxygen to a fire, you get a stronger fire. K&N cold air intake systems are designed to deliver more oxygen-rich cold air into the engine than a stock air intake tract. This results in a stronger 'explosion', which contains more force to push the piston down and turn the crankshaft. That extra energy/power is then transferred to the transmission and out to the wheels.

O2 = HP

Most K&N cold air intake systems are designed to replace restrictive factory components with an easy to install air intake tube, high-flow air filter, and application specific air filter heat shield

The resulting horsepower gain varies by product and application, but each K&N cold air intake system has been designed to increase airflow efficiency for specific vehicles and their engines. Each of K&N’s performance air intake kits undergo significant testing to ensure that the high-flow K&N air filter and intake tube is positioned to collect and deliver the coolest air possible. An engine bay is filled with low-performing warm air, and if the air filter placement is less than ideal (usually due to space limitations), K&N cold air intake systems will use application specific air filter heat shields to prevent warm air from entering the system.

Breathing in More Power

K&N performance cold air intakes include step-by-step installation instructions with photos, and many even have an associated installation video available online

Clean air is vital to the performance of not only the engine, but a cold air intake system as well. That's why each K&N performance intake system comes with a K&N high-flow cotton gauze air filter. These legendary K&N air filters are made with 4-6 layers of our proprietary cotton gauze material sandwiched between 2 layers of rugged aluminum mesh. When combined with the unique K&N filter oil, the cotton fibers are able to attract contaminants that are smaller in diameter than a human hair. This type of filtration is called "depth loading", and it keeps dirt particles trapped within the matrix of cotton fibers, while more air flows through to the engine. K&N air filters typically score 97%-99% filtration efficiency following the ISO 5011 Air Filter Test protocol.

Installing a K&N Cold Air Intake System

The K&N air filters used in K&N cold air intakes can go up to 100,000 miles before cleaning, depending on driving conditions, but can be easily cleaned with a K&N Recharger Kit

Thanks to extensive Research & Development, K&N engineers are able to create cold air intake systems that are extremely effective, yet easy to install. Most K&N performance intakes can be installed using the factory mounting points, so you typically won't need more than a few wrenches and a screwdriver. But regardless of which system you choose, it will come with a step-by-step instruction guide, complete with photos of each step, and a tool list. Plus, the K&N Technical Support team is just a phone call away.

K&N Warranty

Besides increasing horsepower and torque, a K&N cold air intake system will save you time and money. Every K&N air filter can be washed and reused over and over again. So, you won't have to buy a new air filter every 10,000-15,000 thousand miles. Just wash out your K&N air intake air filter every 100,000 miles (depending on driving conditions), then re-install it. The entire K&N cold air intake system is backed by the K&N 10-year/Million Mile Limited Warranty, so you get guaranteed performance and guaranteed quality.

Street Legal Air Intakes

K&N performs in-house dyno testing on each cold air intake to provide vehicle owners with an idea of the estimated increase in horsepower they might experience

Many K&N cold air intake systems are completely street legal in all 50 states, and will come with a California Air Resource Board (CARB) Executive Order (EO) number which guarantees that particular air intake kit has been tested to comply with the current emissions standards. EO numbers apply to the kit, as well as to the year, make and model of vehicle that it is being installed on. Intake systems without an EO number are street legal in most states, but cannot be installed on emissions controlled vehicles in the state of California, or other states that have adopted California emission standards. You can use K&N's search by part tool to learn which cold air intakes are CARB exempt, and for which vehicles.

K&N Air Intake Horsepower Gains

We can't guarantee that you will get a specific horsepower and foot-pounds of torque, because things like the mileage, modifications and condition of your exact vehicle will factor into the final number. But we can show you the dyno results for a vehicle just like yours, that's been fitted with one of our many K&N cold air intake systems.

Benefits of a K&N cold air intake include:

• Significantly Improves Airflow to the Engine
• Guaranteed to Increase Horsepower
• Engineered for Specific Make / Model / Engine
• Reusable Filters Can Go Up to 100,000 Miles Before Filter Servicing is Required
• Easy to Install, Usually in 90 Minutes or Less!
• Backed by a 10-Year/million mile limited warranty®
• Available for Many Popular Automotive, Motorcycle, ATV and UTV Applications
• You Can Order Your K&N air intake Factory Direct today!
• Fast and FREE SHIPPING with Minimum Order

Plus, K&N also manufacture lots of other racing and automotive performance parts like high-volume fuel pumps, oil filters, and carbon fiber hood scoops. So to check out what's available for your vehicle, use the K&N search by vehicle tool. Or, you can use the K&N dealer locator to find a K&N dealer near you.

Boost performance of 1996-2001 Jeep Cherokee models powered by the venerable 4.0L straight-6, originally designed by AMC in 1964, with a K&N performance air intake system

First introduced by American Motors back in 1984, the Jeep Cherokee helped to usher in the modern era of SUV's. By the early 90's, it had become one of the most popular and powerful midsize Sport Utility Vehicles on the market. Suburbanites were ditching their minivans and flocking en masse to the SUV, so to help it keep pace with the competition; Jeep significantly updated the Cherokee in 1996 and 1997. They did however; keep the venerable 4.0L straight-6, which was originally designed by AMC back in 1964. Thanks to fuel injection, and a host of other modern improvements, the Jeep Cherokee 4.0L made a very adequate 190-hp and 225 lb-ft of torque. But owners can now enjoy more performance from their 1996-2001 Jeep Cherokee, thanks to a K&N FIPK Air Intake System.

First introduced by American Motors back in 1984, the Jeep Cherokee helped to usher in the modern era of SUV's

Designed specifically to fit the 1996-2001 Jeep Cherokee 4.0 H.O. inline-6, the K&N FIPK Air Intake System, number 57-1518, is able to deliver more horsepower and torque, by reducing the airflow restrictions between the air filter and the intake manifold. A high-volume conical K&N air filter fits in place of the stock air box, and feeds significantly more air to the engine through a special rotationally molded intake tube. This low-restriction intake tube is made from rugged High Density Polyethylene (HDPE), so you won't have to worry about it on the trail. HDPE can also help to prevent engine heat from warming the air before it reaches the throttle body. The shape of the tube itself has been engineered to reduce air turbulence and deliver more air to the throttle body, faster.

To ensure a constant supply of cool air, the 1996-2001 Jeep Cherokee K&N FIPK Intake System comes with a special heat shield that protects the air filter from engine bay heat. The high-flow K&N air filter is not only washable and reusable but it is backed by a 10-year/million mile limited warranty. The oiled cotton gauze filter media is also able to provide much better air flow than a synthetic or stock paper air filter, without sacrificing engine protection. So no matter how much dust you kick up on the trail, your engine will be protected.

When K&N air intake 57-1518 was dyno tested on a 1997 Jeep Cherokee 4.0L an estimated 7.9 horsepower and 9.19 lb-ft of torque was gained at the rear wheels

This 57-Series K&N FIPK Air Intake System was designed exclusively for the 1996-2001 Jeep Cherokee 4.0L, which means that it will fit in place of the stock intake system with no modifications and the intake tube even accommodates the factory crank case ventilation hose. Using the factory mounting points, installation should take about 90-minutes, and only requires 2 wrenches and a screwdriver. This intake system is street legal in all 50 states, and is backed by a 10-year/million mile limited warranty.

K&N Air Intake Part Number 57-1518 for 1996-2001 Jeep Cherokee 4.0L:

• Guaranteed to increase horsepower
• Designed to improve throttle response and engine sound
• Lasts up to 100,000 miles before service is required (depending on driving conditions)
• Replaces entire factory air intake system
• Free-flowing high density polyethylene tube
• Easy to install, usually in 90 minutes or less
• Washable and reusable high-flow K&N air filter
• Backed by a 10-year/million mile limited warranty

K&N air intake 57-1518 will fit the following Jeep Cherokee models:

2001 Jeep Cherokee 4.0L L6
2000 Jeep Cherokee 4.0L L6
1999 Jeep Cherokee 4.0L L6
1998 Jeep Cherokee 4.0L L6
1997 Jeep Cherokee 4.0L L6
1996 Jeep Cherokee 4.0L L6

Find additional air intake systems for the Jeep Cherokee by viewing the Air Intake Systems for the Jeep Cherokee page, or find additional K&N performance parts for all vehicles by using the K&N Vehicle Search tool. Use the Dealer Search function to find a local authorized K&N dealer.

As a figure head of 4 Wheel Parts, and a successful off road short course racer, it seems hard to believe that Greg Adler could penetrate his organization without being recognized

4 Wheel Parts is the global leader in off-road truck, Jeep, and SUV aftermarket performance products. 4 Wheel Parts follows a unique business model as it functions both as a direct retailer for consumers and a distributor to smaller shops or repair facilities. Greg Adler is the President & CEO of 4 Wheel Parts, but also races professionally in the Lucas Oil Off Road Racing Series (LOORRS) in the Pro4 unlimited class. As a figure head of a large enthusiast driven company, and a successful off road short course racer, it seems hard to believe that he could penetrate 4 Wheel Parts without being recognized.

Greg Adler is the President & CEO of 4 Wheel Parts, but also races professionally in the Lucas Oil Off Road Racing Series (LOORRS) in a K&N equipped Pro4 short course truck

However, this is exactly what Greg Adler managed to pull off for an episode of the CBS Television Network’s series “Undercover Boss.” The series is a two-time Emmy Award-winning reality show in its seventh season on CBS. The premise of this reality show is to anonymously follow high-level executives who attempt to slip into their own organization “undercover.” The show’s makeup artists had their work cut out for them if Greg Adler was to successfully pull this off. Greg was transformed from a seemingly fit man with a full head of hair and beard, to a slightly overweight balding gentleman sporting mutton chops & thick rimmed eye glasses.

For Undercover Boss Greg was transformed from a fit man with a full head of hair and beard, to a slightly overweight balding gentleman sporting mutton chops & thick rimmed eye glasses

During Adler’s time spent working alongside the folks that keep the wheels of 4 Wheel Parts turning, he performed a variety of jobs from retail sales to distribution operations. “4 Wheel Parts is in the midst of an aggressive national expansion and going undercover allowed me the opportunity to step out of my role as CEO and into many of the jobs that are the backbone of our company,” said Adler. “I learned a great deal about our business from the experience and as a result we have been able to enact many companywide initiatives. Most importantly, going undercover reinforced the importance of family to me and reminded me that as the business grows, we continue to keep the feeling of family that is the legacy of 4 Wheel Parts.”

The episode of the CBS TV Network’s series Undercover Boss featuring Greg Adler will premiere on Friday February 5, 2016 at 8:00-9:00 PM, ET/PT. The Lucas Oil Off-Road Racing Series, where Greg Adler drives his K&N Air Filters equipped Pro4 short course truck, will kick off its 2016 season on March 19-20, 2016 at the Wild Horse Pass Motorsports Park in Chandler, Arizona.

Find K&N performance upgrades for your truck, jeep, or soccer mom van, using the Search By Vehicle tool. Then use the K&N dealer search to find an authorized K&N dealer online or locally.

The 33-3007 K&N replacement cleanable, reusable cotton gauze air filter is a 13.56 in x 7.72 in x 1.75 panel shaped air filter that fits more than 20 models of Renault and Dacia passenger vehicles

Intended for use in 2012-2017 Renault (Clio, Captur) and Dacia (Logan, Lodgy, Duster, Dokker, Sandero) subcompacts, a pleased buyer in Caritiba, Brazil, found the 33-3007 Replacement Air Filter fit perfectly in his 2015-2017 Renault Sandero R.S. and let us know with its first five-star review, plus praise for K&N's quality and performance.

As an air filter for Renault & Dacia economy vehicles, it will be important to owners for their vehicles to have a long lifetime, and a cleanable / reusable K&N air filter

The Sandero R.S. is the first Renault Sport to be manufactured outside Europe, and Renault Design America Latina in Sao Paulo contributed to its development, adapting the European platform to the needs of the Latin American market. Designers called upon Renault's racing heritage to spiff up this entry-level economy hatchback with an enlarged air dam, new grille, front bumper with an F1-style blade, side skirts and spoiler. The resulting look and feel generated considerable attention at its launch in 2015. And supporting Renault Sport's performance heritage, the 2,500-pound Sandero R.S. has a 4-cylinder, naturally aspirated gasoline engine developing 150bhp, a six-speed manual transmission, sport-tuned suspension and improved electronic stability control, and disc brakes on all four 16- or 17-inch wheels.

As a sporty addition to the Latin American motoring scene, the Sandero R.S. could signal a return to the days of the hot hatch and owners are upping their Sanderos' performance potential with K&N replacement filters. K&N's Air Filter Test data, following the ISO 5011 protocol shows the 33-3007's overall efficiency is 98.57%, so the R.S. can potentially breathe better, without sacrificing engine protection.

As an air filter for Renault & Dacia economy vehicles, it will be important to owners for their vehicles to have a long lifetime, and a cleanable / reusable K&N air filter. A K&N replacement air filter can play a significant role, allowing enhanced air flow and filtration, and engine protection from a product that they don't have to throw away. K&N replacement air filters are backed by a 10-year/million mile limited warranty and will eventually pay for themselves.

Construction of K&N filters differs from typical automotive manufacturer or replacement aftermarket filters in that K&N uses cotton gauze, woven to exacting specifications. Cotton breathes better than paper or foam, and it can be cleaned and used again. Typically, a K&N filter's first service is not needed until 50,000 miles, depending on driving conditions. With the K&N Air Filter Cleaning Kit it can be cleaned and re-oiled, returning it to like-new condition and eliminating waste generated by disposing of paper filters.

The K&N Cross-Reference for the 33-3007 lists these Renault part numbers:
165467674
16546764R
and this Mann-Hummel number
C27029

For a complete list of vehicles that can use K&N 33-3007 Replacement Air Filter, see the this list:

2017 Renault Clio IV 1.6L L4
2017 Renault Clio IV 1.5L L4 Diesel
2017 Renault Clio IV 1.2L L4 F/I - Turbo
2017 Renault Clio IV 0.9L L3
2017 Renault Captur 1.5L L4 Diesel
2017 Renault Captur 1.2L L4
2017 Renault Captur 0.9L L3
2017 Dacia Sandero 1.5L L4 Diesel
2017 Dacia Sandero 0.9L L3
2017 Dacia LOGAN 1.5L L4 Diesel
2017 Dacia LOGAN 0.9L L3
2017 Dacia Lodgy 1.5L L4 Diesel
2017 Dacia Lodgy 1.2L L4
2017 Dacia DUSTER 1.5L L4 Diesel
2017 Dacia DUSTER 1.2L L4
2017 Dacia Dokker 1.5L L4 Diesel
2017 Dacia Dokker 1.2L L4
2016 Renault Clio IV 1.6L L4
2016 Renault Clio IV 1.5L L4 Diesel
2016 Renault Clio IV 1.2L L4 Turbo
2016 Renault Clio IV 0.9L L3
2016 Renault Captur 1.5L L4 Diesel
2016 Renault Captur 1.2L L4
2016 Renault Captur 0.9L L3
2016 Dacia Sandero 1.5L L4 Diesel
2016 Dacia Sandero 0.9L L3
2016 Dacia Logan 1.5L L4 Diesel
2016 Dacia Logan 0.9L L3
2016 Dacia Lodgy 1.5L L4 Diesel
2016 Dacia Lodgy 1.2L L4
2016 Dacia Duster 1.5L L4 Diesel
2016 Dacia Duster 1.2L L4
2016 Dacia Dokker 1.5L L4 Diesel
2016 Dacia Dokker 1.2L L4
2015 Renault Clio Iv 1.6L L4
2015 Renault Clio Iv 1.5L L4 Diesel
2015 Renault Clio Iv 1.2L L4 Turbo
2015 Renault Clio Iv 0.9L L3
2015 Renault Captur 1.5L L4 Diesel
2015 Renault Captur 1.2L L4
2015 Renault Captur 0.9L L3
2015 Dacia Sandero 1.5L L4 Diesel
2015 Dacia Sandero 0.9L L3
2015 Dacia Logan 1.5L L4 Diesel
2015 Dacia Logan 0.9L L3
2015 Dacia Lodgy 1.5L L4 Diesel
2015 Dacia Lodgy 1.2L L4 Turbo
2015 Dacia Duster 1.5L L4 Dsl - OEM 16546767R
2015 Dacia Duster 1.2L L4 Turbo
2015 Dacia Dokker 1.5L L4 Diesel
2015 Dacia Dokker 1.2L L4 Turbo
2014 Renault Clio Iv 1.6L L4
2014 Renault Clio Iv 1.5L L4 Diesel
2014 Renault Clio Iv 1.2L L4 Turbo
2014 Renault Clio Iv 0.9L L3
2014 Renault Captur 1.5L L4 Diesel
2014 Renault Captur 1.2L L4
2014 Renault Captur 0.9L L3
2014 Dacia Sandero 1.5L L4 Diesel
2014 Dacia Sandero 0.9L L3
2014 Dacia Logan 1.5L L4 Diesel
2014 Dacia Logan 0.9L L3
2014 Dacia Lodgy 1.5L L4 Diesel
2014 Dacia Lodgy 1.2L L4 Turbo
2014 Dacia Duster 1.5L L4 Dsl - OEM 16546767R
2014 Dacia Duster 1.2L L4 Turbo
2014 Dacia Dokker 1.5L L4 Diesel
2014 Dacia Dokker 1.2L L4 Turbo
2013 Renault Clio Iv 1.6L L4
2013 Renault Clio Iv 1.5L L4 Diesel
2013 Renault Clio Iv 1.2L L4 Turbo
2013 Renault Clio Iv 0.9L L3
2013 Renault Captur 1.5L L4 Diesel
2013 Renault Captur 1.2L L4
2013 Renault Captur 0.9L L3
2013 Dacia Sandero 1.5L L4 Diesel - From 5/13
2013 Dacia Sandero 0.9L L3
2013 Dacia Logan 1.5L L4 Diesel - From 5/13
2013 Dacia Logan 0.9L L3
2013 Dacia Lodgy 1.5L L4 Diesel
2013 Dacia Lodgy 1.2L L4 Turbo
2013 Dacia Dokker 1.5L L4 Diesel
2013 Dacia Dokker 1.2L L4 Turbo
2012 Dacia Lodgy 1.5L L4 Diesel
2012 Dacia Lodgy 1.2L L4 Turbo
2012 Dacia Dokker 1.5L L4 Diesel
2012 Dacia Dokker 1.2L L4 F/I – Turbo

Find a K&N replacement air filter, or K&N air intake system for many other vehicles using the Search by Vehicle tool. Then use the K&N Dealer Search to find an authorized K&N dealer in almost any part of the world.

Freestyle Motocross athlete Lance Coury says winning a gold medal at the 2013 Summer X-Games has been the highlight of his career so far

In 2011 when Lance Coury first signed on with K&N, he was only 20 years old and already recognized as a heavy hitter in the FMX world

K&N has produced an ultra-high-quality limited edition calendar since 2011. One of the best parts about the K&N calendar is that each year it highlights some of K&N’s sponsored racers, high-profile custom vehicle builders, and even several vehicles belonging to employees of K&N Filters. Coincidentally, the February 2016 page of the K&N calendar features a K&N sponsored athlete who first partnered with K&N in 2011. At the time Freestyle Motocross (FMX) sensation Lance Coury first signed on with K&N, he was only 20 years old and already recognized as a heavy hitter in the FMX world.

Lance has been riding motorcycles since he was 4 years old. “I grew up with cousins who rode, when I was finally old enough to get on and go, I was in love,” said Coury. He has always been competitive, but not always in freestyle. He started his career racing motocross before he shifted gears to FMX at around 15 years old. “I started to enjoy jumping more than anything. So I reached out to FMX riders to start hitting ramps and learning tricks,” recalled Coury.

Lance’s passion for all things two-wheeled, as well as his faith in K&N air filters, has been unwavering since before his professional FMX career. “I have been using K&N filters since I was 12 years old on my Go-Peds. Then [I] graduated to K&N Filters on my first truck, a Chevy Silverado. I have now been using K&N Filters on my dirtbikes for over 5 years. Great durable filters that are easy to clean,” said Coury.

Participating in the photoshoot for the 2016 K&N calendar may sound like fun and games, but Lance Coury and his wife Courtney spent all day shooting on his Harley and at Wyvern Ranch

Lance Coury’s current weapon of choice for freestyle competition is an RCH racing 2016 Suzuki RMZ450. Not a whole lot needed to be changed in order to transform a showroom stock 2016 RMZ450 into a serious FMX threat. Lance runs RG3 suspension, as well as a GPR stabilizer, for better control. Coury uses stronger than stock Rad Manufacturing wheels, and cuts out grab holes in the factory RMZ number plates. Other than that Lance said “I have a K&N air filter YA-2506XD for improved airflow and a Yoshimura Exhaust to go along with it.”

Lance said his most memorable moment of his career to date is winning a gold medal at the 2013 Summer X-Games for the Speed and Style event in Foz Do Iguacu, Brazil. “Riding the X Games was always a career goal, and to come in and win a Gold medal was just insane! Definitely a career highlight,” declared Coury. While being chosen to appear in the 2016 K&N calendar pales in comparison to winning X-Games gold, Coury said “Shooting for the Calendar was rad. It was cool to have Courtney involved.”

Courtney Coury travels with her husband Lance around the world for his freestyle career and she also helps Lance with his Harley-Davidson parts brand, Thrashin Supply

Participating in the photoshoot for the 2016 K&N calendar may sound like it’s all fun and games, but Coury is quick to point out “We had a long day, the morning was on the Harley doing wheelies and burn outs, and the evening we sessioned my FMX part at Wyvern Ranch.” As Lance indicated, not only was he part of the 2016 K&N calendar, but so was his wife Courtney Coury. Lance laughingly said, “Courtney and I met in 6th grade when we were 11. I asked her to be my girlfriend and she walked away.” He continued, “We stayed friends and got married when we were 22.”

While Mrs. Coury is easy on the eyes, its elements beyond what the eyes can see that are most impressive. Lance revealed, “She [Courtney] went to the University of Utah, and even worked as a CFO at an aerospace machine shop for a couple of years.” These days Courtney is focused on promoting Lance’s freestyle career. “We travel a lot. We have traveled around the world for my freestyle career, all over Europe, Dubai, America, South America, to name a few,” said Lance. Plus, while Courtney doesn’t have a background in motorcycles she helps Lance with his Harley-Davidson parts business, Thrashin Supply.

The February 2016 K&N calendar desktop wallpaper images are available to download in a standard screen or widescreen format on the Free K&N Racing Wallpaper for Computer Desktops page. The K&N 2016 calendar is currently available for sale and can be purchased directly at knfilters.com/calendar. These calendars have been printed in limited quantities, so once they're gone, they're gone.

Find a K&N replacement air filter, or K&N air intake system for your vehicle using the Search by Vehicle tool. Then use the K&N Dealer Search to find an authorized K&N dealer in almost any part of the world.

Standard Screen download of Lance and Courtney Coury in the 2016 K&N Calendar

Widescreen download of Lance and Courtney Coury in the 2016 K&N Calendar