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Harley-Davidson Twin Cam Enthusiasts Recommend K&N Air Filter Assembly

K&N's popular custom air filter assembly, part RK-3909-1, was designed to provide better performance while retaining the stock appearance of 1999-2007 Twin Cam® Harley-Davidson® engines (see applications).  It comes with a powder coated billet aluminum back plate that eliminates external breathers and features a built-in, dyno-tuned velocity stack.  The resulting design provides significant airflow increase to the engine without sacrificing filtration.  This product has generated a lot of excitement from Harley-Davidson motorcycle owners. 

Brian Keller of Boston, Massachusetts has a 2005 Harley Davidson Road King Classic with 27,500 miles. He also has a K&N Engineering Air Filter Assembly (RK-3909-1).

Brian Keller's 2005 Harley Davidson Road King Classic
Brian Keller's 2005 Harley Davidson Road King Classic


K&N Engineering's RK-3909-1
K&N Engineering's RK-3909-1
“K&N makes a terrific product,” said Keller. “After adding Bassani True-Dual Powercurve pipes with Reverse Cone Megaphone slip-ons, a Dynojet power commander and the K&N High Flow Air Filter, I gained some serious horsepower and torque.”

Brian Keller said K&N adds horsepower and torque to his Harley
Brian Keller said K&N adds horsepower and torque to his Harley
Keller said having a motorcycle can be all about power and torque, but safety is also important. “When I get on the highway I have the throttle I need,” he said. “The bike has instant power with a little twist.”

One of the reasons Keller bought his Twin Cam Harley Davidson was for long distance riding. “It’s super smooth and I can go 400 miles in comfort,” he said. “I recommend RK-3909-1 to everyone I ride with. When I added the K&N Air Filter it was a smooth ride all the time. It is like night and day with the K&N Air Filter. My Harley runs like it’s brand new.”

“Wizard Cycles of Nashua, New Hampshire installed the K&N Air Filter Assembly and pipes for me,” said Keller. “Speeds Performance Plus of Elk River, Minnesota installed my Power Commander and I dyno-tuned my bike at Laconia Bike Week this year. K&N gives me the extra juice I need and allows me to keep up with the Screaming Eagle Harley engines.  It’s also about having a good time, knowing I have a fantastic K&N Air Filter."

Kenneth Roberg of Franklin Park, Illinois also installed K&N’s RK-3909-1. “At the same time I installed a new exhaust system and a fuel pack which coordinates the right fuel mix with my setup,” said Roberg. “For the most part I am satisfied and have noticed better fuel mileage. By the way, the K&N Filter fits behind the stock cover perfectly.”

Paul Haberstroh is a professional photographer in Lafayette, Colorado. He knows film and he knows K&N Filters. Haberstroh also drives a 2007 Harley Davidson Road King Classic around his beautiful small town.

Paul Haberstroh uses K&N Products, phot by Paul Haberstroh
Paul Haberstroh uses K&N Products, photo by Paul Haberstroh
Paul Haberstorh gets improved throttle response with K&N, photo by Paul Haberstroh
Paul Haberstroh gets improved throttle response with K&N, photo by Paul Haberstroh
“I’ve used K&N Air Filters for as long as I can remember and I’ve had a camera in my hand for as long as I remember,” said the 49-year-old. “I used to ride a BMW, but I went to Harley when they came out with the Twin-Cam engine and the retro classic styling.”
Paul Haberstroh noticed an improvement in gas milage with K&N, photo by Paul Haberstroh
Paul Haberstroh noticed an improvement in gas mileage with K&N, photo by Paul Haberstroh

Haberstroh equipped his Harley with K&N Engineering’s RK-3909-1.  “I really noticed a difference in the throttle,” said Haberstroh. “K&N also improved my acceleration. It’s amazing how good the gas mileage is with K&N on my Harley. This is a very comfortable machine. I can go hundreds of miles on it and gas mileage is important.”

The Colorado wedding photographer also drives a 2007 Dodge Ram 1500 pick up.  “I put a K&N 63-Series AirCharger Air Intake on my Dodge,” he said. “I live at 6000 feet and my work frequently takes me up to 10,000 feet in elevation. Normally I’d lose performance, but with K&N I never have to worry about that.  My Dodge works well in the thin air with K&N. It really makes a difference in performance for people like me who live in the higher elevations.”

Haberstroh quit his day job ten years ago to start Distinctive Imaging, Inc., in Colorado. He took his camera and he took his commitment to K&N.

Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.

World of Outlaws Donny Schatz has $80,000 Sprint Car Racing Payday

In sprint car racing, July is the so-called “Month of Money.” Donny Schatz and his ParkerStore Team are having a good week, to the tune of $80,000.
Donny Schatz wins Silver Cup Donny Schatz wins Silver Cup
The Defending World of Outlaws Champion scored his second consecutive Don Martin Memorial Silver Cup at Lerneville Speedway in Sarver, Pennsylvania. The Fargo, North Dakota racer earned $30,000 for the win, only four days after his $50,000 victory in Saturday’s 24th annual Kings Royal by Crown Royal.

Donny Schatz uses K&N Engineering Products
Donny Schatz uses K&N Engineering Products
“This is what it’s all about,” said Schatz. “It’s always about winning races, but when you can string a couple of really big ones together that really keeps a team motivated. Now we’re just thinking about heading down the road and focusing on getting the next one.”

The night did not start well for Schatz who qualified 23rd in the field of 46 cars. In the heat he worked his way from the sixth place starting position into the second place position to qualify for the Crane Cams Dash. He started third and finished second in the five-lap race to earn a front row starting spot in the 40-lap A Feature.

Craig Dollansky shot out to an early lead with Schatz chasing him. At lap 10 Schatz pushed in front of the pack in a non-stop race that only took less than eleven minutes to complete.

“We knew Craig was going to get a quick start,” said Schatz. “He was working the cushion pretty good and we just stayed patient and made the bottom work. I knew I was going to have to be able to race all over the place. I wasn’t sure if anyone was close at the end, so I just kept charging forward.”

The victory came with a comfortable margin for Schatz. He won as Dollansky was entering the third turn. Donny Schatz uses K&N Engineering Products. “The K&N airbox allowed us to keep clean air going through our engine,” said Schatz. “Our engine produced more than enough horsepower for us to win.”

Schatz heads to the Cleveland Brothers Summer Nationals at Williams Grove Speedway. The finale offers $20,000 to the winner.

Follow Donny Schatz and the ParkerStore Team throughout the racing season at the K&N news site. Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.

2007 to 20011 Polaris Outlaw 525 ATV Gets Outstanding Engine Protection with K&N Air Filter

Air Filter for Polaris Outlaw 525

Air Filter for Polaris Outlaw 525

The 2007 Polaris Outlaw 525 is one of the fastest sport quads with independent rear suspension. The Outlaw 525 is the result of a project between Polaris and KTM to create the fastest acceleration production ATV on the market.

Air Filter Installed in Polaris Outlaw 525

Air Filter Installed in Polaris Outlaw 525

K&N Engineering has designed a Replacement Air Filter (PL-5207) for the 2007 to 2011 Polaris Outlaw 525. K&N Replacement Air Filter's pleated cotton design offers a larger surface area over a foam air filter and provides outstanding engine protection. 

Simply remove the stock air filter from the airbox and install the K&N ATV air filteraccording to the included instructions for added performance and excellent filtration.

The PL-5207 offers your Polaris the air it needs to provide optimum horsepower. This washable, reusable K&N Air Filter works great in high altitudes and in dirty off-road conditions. It is covered by our K&N Racing and Off-Road Limited Warranty.

Find K&N products for your vehicle using the K&N application search or use the K&N dealer search to find a K&N dealer in your part of the world.

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K&N Horsepower Challenge Rewards Top Qualifier at Mopar Mile-High NHRA Nationals

Allen Johnson captured his first race of the season at Bandimere Speedway at the Mopar Mile-High NHRA Nationals. He also won points toward qualification for the K&N Horsepower Challenge, a special race-within-a-race bonus program for the top Pro Stock drivers in the NHRA POWERade Drag Racing Series.

Allen Johnson earns $3000 in K&N Horsepower Challenge Program
Allen Johnson earns $3000 in K&N Horsepower Challenge Program
Johnson ran well all weekend long in Denver, Colorado. “It was a fairy tale weekend,” said Johnson. “This was a Mopar event and we were the fastest car and No. 1 qualifier. We’ve been a win waiting to happen since the first of the year and just hadn’t gotten a break.” It had been thirteen years since a Mopar had won Pro Stock at an event they sponsored.

Allen Johnson wins pro stock at Morar Mile-High NHRA Nationals
Allen Johnson wins pro stock at Mopar Mile-High NHRA Nationals
“Going into the finals we knew it was going to be tough,” said Johnson. “Ron Krisher was fast all day and I knew it was going to be close. Every run we made was pretty awesome. We were on our game.”

Johnson has earned $3,000 for being the No. 1 qualifier at Denver along with points towards  the 2008 K&N Horsepower Challenge. Pro Stock drivers who accumulate the most points in qualifying during the 23-race Challenge series have a chance to earn $50,000. The runner-up earns $10,000, the two-semifinalists earn $3,000 each and the four first-round finishers will receive $2,500 each.

Johnson’s next race is the Schuck’s Auto Supply NHRA Nationals at Seattle, Washington.

Follow Allen Johnson's progress throughout the racing season at the K&N news site. Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.

California Teen Qualifies for Rotax Max Challenge North American Grand Nationals

Teen racer Jacob Pearlman of Carlsbad, California has made it to the Rotax Max Challenge North American Grand Nationals.
Jacob Pearlman at Apex Raceway
Jacob Pearlman at Apex Raceway

Round 7 of the Gatorz Karting Cup at Perris, California had significant championship implications. It also determined the qualifiers for the North American Rotax Max Challenge Grand Nationals.

“With so much on the line, the racers were aggressive and determined,” said Jacob’s father Richard Pearlman. “Despite all the competition and getting caught in two crashes, Jacob held on to move up to 5th place in season point standings. He also earned a qualifying spot in the Rotax Max Challenge, presented by Champ Car in Denver, Colorado.”

The racing day began with an uncooperative motor for JP. “When the official racing began in the afternoon, the best JP could do in qualifying was an unusual and disappointed 11th place,” said Pearlman. “It didn’t stop him. JP lined up on the inside of the 6th row for the start of the 20 lap heat race. By the end of the sixth lap, he moved up to the 8th position as was running with the lead pack.”

Another kart pulled in front of the whole group in the narrowest and tightest part of the circuit. The resulting contact among several karts sent JP’s #125 DPK/Birel with K&N Engineering Products spinning into the deep sand of the infield at Apex Raceway. He finished 12th in the heat.

The 34 lap main started at 9pm. “Trouble found JP in the very first turn,” said Pearlman. “Contact in the front of the pack sent one of the lead karts into the infield, then back on the track in front of Jacob’s kart. The impact shot JP and his Birel into the outside line of karts. Jacob held on even though he was hit by four other karts.”

JP corrected in time and was back on the gas tracking down the pack. He moved forward from 16th to finish in 7th place. He is optimistic as he looks toward the Grand Nationals next month. “Wow, I can’t wait to go to Denver,” said JP. “I am really proud to have K&N Products on my kart for the Grand Nationals. K&N is a key part to our success.”

Follow Jacob Pearlman's progress throughout the racing season at the K&N news site. Find K&N products for your vehicle using the K&N application search then use the K&N dealer search to find a K&N dealer in your part of the world.