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Reusable K&N Heavy Duty Air Filter for Some Kenworth, Peterbilt and Western Star Trucks Available

K&N Heavy Duty Air Filter 38-2021R
K&N Heavy Duty Air Filter 38-2021R
K&N Heavy Duty Diesel Air Filters are designed to increase horsepower through a low-restriction, high air flow design.  While this is a great feature the fact that they are washable and reusable in a world of throw away filters gets the attention of big rig truck owners.  After they see how easy the process is to clean the filters and get them reinstalled the main question is does K&N make one for my rig?  Watch K&N's Heavy Duty Air Filter Cleaning video to see for yourself.

K&N has been working hard releasing new parts to increase class 4-8 truck coverage.  One addition to the K&N heavy duty air filter line is part number 38-2021R. This washable/reusable air filter is manufactured from quality components and backed by K&N's Heavy Duty Air Filter 3-year/300,000 mile limited warranty.

K&N's 38-2021R is a reverse flow air filter meaning the air flows from inside the air filter then out through the sides.  This filter's hybrid synthetic material does not require oil like most K&N products. No oil equates to less time spent servicing the air filter.

The 38-2021R air filter is made with thick urethane seals, heavy duty wire mesh for structural support, and durable air filter material for long life.  It is used on some Kenworth, Peterbilt, and Western Star Trucks as well as in other applications.

The best method of determining the correct K&N heavy duty air filter for your needs is to use our air filter cross reference search.

The 38-2021R is a cross reference to the disposable air filter parts listed below:

Baldwin RS3534
Carquest 88863
Donaldson P534925
Fleetguard AF25248
Fram CA8231
Hastings AF2283
Luber-Finer LAF3302
Napa 6863
Purolator A75974
WIX 46863

Find K&N products for your street car or truck 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.

K&N Performance Air Filter for Select 2006 to 2014 Hyosung Motorcycles

Replacement Air Filter for Hyosung 2006-2009 GT650 models and 2006 to 2014 GT250 Motorcycles
Replacement Air Filter for Hyosung 2006-2009 GT650 models and 2006 to 2014 GT250 Motorcycles
Hyosung is a well-established, Korean based, company that offers street bikes with generous power bands and sporty suspension. Hyosung first broke into the US street bike battle around 2005. Since then they have tried to compete with the Big 4. Along the way various improvements were made to the Hyosung street bike line. The biggest improvement was the cross over to fuel injection which increased responsiveness on their 250cc and 650cc models.
Restriction Chart for HY-6507 Air Filter
Restriction Chart for HY-6507 Air Filter


The sporty V-twin Hyosung GT650 models offer good quality, a comfortable riding position, and better control at a great price. These qualities make it a nice option for beginner level riders.

K&N recognizes the GT650 as a perfect candidate for a high flow motorcycle air filter and designed part number HY-6507 specifically for select 2006-2009 GT650 models and 2006 to 2014 GT250 models.  See list below.  This quality washable/reusable air filter flows better than the OEM paper element for better performance. No tuning is required to run HY-6507 on your GT650.  Installation is easy as bolts hold it in place just like the OEM filter.  K&N's HY-6507 is designed to add power while providing excellent engine protection and it is backed by the K&N million mile limited warranty.

Part HY-6507 takes the place of the factory air filter and is offered for the following applications:

2014 HYOSUNG GT250R 250
2014 HYOSUNG GT250 250
2013 HYOSUNG GT250R 250
2013 HYOSUNG GT250 250
2012 HYOSUNG GT250R 250
2012 HYOSUNG GT250 250
2011 HYOSUNG GT250R 250
2011 HYOSUNG GT250 250
2010 HYOSUNG GT250R 250
2010 HYOSUNG GT250 250
2009 HYOSUNG GT650R 647
2009 HYOSUNG GT650 647
2009 HYOSUNG GT250R 250
2009 HYOSUNG GT250 250
2008 HYOSUNG GV650 647
2008 HYOSUNG GT650S 647
2008 HYOSUNG GT650R 647
2008 HYOSUNG GT650 647
2008 HYOSUNG GT250R 250
2008 HYOSUNG GT250 250
2008 HYOSUNG GT125 COMET 125
2007 HYOSUNG GV650 647
2007 HYOSUNG GT650S 647
2007 HYOSUNG GT650R 647
2007 HYOSUNG GT650 647
2007 HYOSUNG GT250R 250
2007 HYOSUNG GT250 250
2007 HYOSUNG GT125 COMET 125
2006 HYOSUNG GV650 647
2006 HYOSUNG GT650S 647
2006 HYOSUNG GT650R 647
2006 HYOSUNG GT250R 250
2006 HYOSUNG GT250 250
2006 HYOSUNG GT125 COMET 125

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.

K&N Reusable Air Filter for Some Freightliner, Peterbilt, Kenworth & Western Star Trucks

K&N Heavy Duty Air Filter 38-2015R
K&N Reusable Heavy Duty Air Filter 38-2015R
For those of you that have attended an automotive race, car show, or expo in the last year where K&N was present, you may have noticed extremely large air filters on display. Often times a person will walk in the booth and ask, "Wow! That's a big filter. What does it fit?" These large filters are part of the new K&N heavy duty air filter line. These massive air filters are designed to fit a wide range of heavy operating equipment like, semi-trucks, motor homes, tractors, and large turbo diesel engines.

One air filter part number in particular, 38-2015R, provides excellent protection for larger diesel engines while increasing air flow. Not to mention, the heavy duty hybrid non-oiled air filter material is tough enough to handle the abuse your rig can dish out. That's right! These air filters do not require oil like a traditional K&N automotive air filters. This saves time when servicing this washable/reusable air filter.

K&N's 38-2015R utilizes heavy duty urethane top and bottom components and a rigid wire mesh for outstanding support. This heavy duty air filter includes a reverse directional flow media that flows from inside to the outside. The red side of the HD air filter signifies the dirty side and the white side signifies the clean side. Cleaning K&N 38-2015R is as easy as spraying on the K&N heavy duty cleaner, rinsing with light pressured water, and drying the air filter with light air pressure from an air compressor.

K&N heavy duty air filters, including 38-2015R, are backed by a 3 year/ 300,000 mile limited warranty.  The 38-2015R fits some Freightliner, Peterbilt, Kenworth, Western Star Trucks, however, the best way to find the correct K&N heavy duty air filter is to use our air filter cross reference search

The 38-2015R is a cross reference to the disposable air filter parts listed below:

Baldwin RS3539
Carquest 88843
Donaldson P534816
Fleetguard AF25247
Fram CA8081
Hastings AF2277
Luber-Finer LAF4816
Napa 6843
Purolator A75254
WIX 46843

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.

2011 to 2014 Ford F-150 Pickup with 5.0L Engine Gets Power from K&N Air Intake

Dyno Chart for 2011 Ford F-150 5.0L
Dyno Chart for 2011 Ford F-150 5.0L
Options can be really exciting when it comes to purchasing a new pickup truck. The popular 2011 Ford F150 provides plenty of options, such as; 3 different engines, 3 bed lengths, 3 cabs sizes, and a hand full of interior and exterior upgrades. One impressive option is the throw back 5.0L engine that produces an estimated 360 horsepower and 380 lb.-ft. of torque. Like most factory vehicles, some horsepower is lost due to a restrictive factory air intake system.
K&N Air Intake System for 2011 to 2014 Ford F-150 5.0L
K&N Air Intake System for 2011 to 2014 Ford F-150 5.0L


An easy way to gain power and performance is to bolt on a K&N air intake system custom designed to fit your 2011 and 2012 Ford F-150 pickup with 5.0L engine.  If you have a different F-150 use K&N's vehicle search.  Part number 57-2581 fits the 5.0 liter model.  It includes a low restriction K&N air filter and free-flowing roto-molded intake tube. Dyno testing was performed on the 57-2581, and revealed an estimated gain just under 12 horsepower at 5304 rpm when installed on 2011 Ford F-150 models with the 5.0 liter engine.

The 57-2581 is equipped with air filter part RC-5173, which is washable and reusable. This over-sized performance air filter can go for up to 100,000 miles before it needs servicing depending on driving conditions. It allows high air flow while providing outstanding filtration. In order to provide cooler air to the engine the RC-5173 is isolated from much of the engine heat by a custom designed heat shield. It is placed on top of the OE inlet in the lower airbox assembly so it can direct cooler outside air toward the air filter.

Owners of a 2011 to 2014 Ford F-150 5.0L can feel confident with K&N's 57-2581 performance air intake, because it is backed by the famous K&N Million Mile Limited Warranty®.  The 57-2581 comes with simple installation instructions and can be installed in 90 minutes or less. Check out the 2011 and 2012 Ford F-150 5.0L Non-Metallic Air Intake Installation Video.

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.

Numerous NHRA Finals Has K&N's Peter Biondo Eyeing Multiple Championships

Peter Biondo's Super Stock GT/DA 2000 Pontiac Firebird
Peter Biondo's Super Stock GT/DA 2000 Pontiac Firebird
Over the last two NHRA National events in Reading and Phoenix, Maspeth, New York's Peter Biondo has racked up three final rounds and immensely added to his 2011 NHRA Lucas Oil Drag Racing Series National point totals. Biondo continues to sit number one in both Super Stock and Super Gas and with only two Nationals left, all eyes are on the east coast racer to take home double championships.

The first two of Biondo's finals came for him during the 27th annual Auto-Plus NHRA Nationals in Reading, Pennsylvania, which for four of the sportsman classes was delayed by a week because of very soggy pit area conditions. Biondo points out that the feel of Maple Grove Raceway event was a little different than a normal National. "It did feel a little more like a divisional and it was run very quickly," he said. "There really wasn't much time to think between rounds. It was very much hot lapping all day long."
Peter Biondo's Super Gas 1963 Chevy Corvette Roadster
Peter Biondo's Super Gas 1963 Chevy Corvette Roadster


Biondo, who was again competing at this event in both his Super Stock GT/DA 2000 Firebird and his Super Gas 1963 Corvette Roadster, prefers racing at events that run quickly like the one did at Reading. "As a driver, it definitely makes it easier when you are running round-robin," he explained. "The weather's not changing, the cars are more dialed, so you can just focus on executing the starting line. You don't have to pay as much attention to the wind, track and weather because it's the same every time. You're not waiting three hours or three days even to make your next run. So as a driver, it's also a little easier to keep your game face on all day, too."

"At Reading, there was zero time to think about anything between rounds," he said. "Especially with those two classes, Super Stock and Super Gas run back-to-back."

In Super Stock, Biondo drove his K&N Firebird through five tough rounds where he sent home, Brinkman, Fetch, Smith, Welker and Miller before finding himself in his first final of the weekend with Joe Santangelo.

"I try not to focus more on any one round or car any different than the next. I try to go up there and do my very best every time," Biondo confessed. "For some reason, I'm sure it was thinking about the points in the back of my head, I was more focused and driving better in Super Gas."

Going into his Super Stock final, Biondo continued to try to combat some of the issues that the carburetor had been giving them in the Firebird. "The car was running anywhere from a sixty-two to a seventy," he said of his ET's during eliminations. "So for the final, we kinda dialed on the high side and hoped that I could hit the tree and do my job. Santangelo did a much better job there and forced me to break out."

Also making his way to the final in Super Gas, Biondo made his way past Paden Sr., Goldman, Sawyer and Barbato in rounds one through four. This set him up for an all-important bye into the championship round. "There's no better feeling, at three cars, than to be sitting there with the bye," he said. "Especially since the race was my last [National] claim for points and I knew deep down, that I needed to improve. I didn't think my score was good enough to hold up. So, having that bye and being able to go to the final, plus adding points was very important to me."

Biondo took his semi-final round bye in Super Gas and met up with fellow Div. 1 racer, Dale Koncen in the final. He gave up a .005 at the tree, but did an outstanding job of driving the stripe in his K&N Corvette to push Koncen way under the 9.90 index and take his first Super Gas National event win of the season. Championship points for Biondo, which added very nicely to his four NHRA Super Gas division titles from earlier this year to keep him in the number one spot in the country.

With no time to celebrate, Biondo loaded up and headed west for the 27th annual NHRA Arizona Nationals, just outside of Phoenix at Firebird Raceway.

"I really think it is something that everyone on this side of the country needs to experience once," he said of his hefty trip out west. "It's so nice and dry. It's just a totally different deal out there. I would highly recommend everyone go out there to race just once."

"I was able to make it to the quarter-finals in Super Gas," he explained of his Arizona event. "I actually lost a really good round there. I was .009 and 9.906 and lost. It was a good run against Gerald Turczyn Jr."

Where Biondo didn't fare well enough to make it into another final in his Corvette that was a different story in his Super Stock Firebird. For the second NHRA National event in a row, Biondo was in the Super Stock final and looking to make it a more favorable outcome than the week before.

"In the Super Stock final, I actually found a new way to lose," he laughed. "My lights the last three rounds before that weren't great, so I decided to take the top off the button, you know we don't have delay boxes in that class, so we adjusted with the transbrake button. I put shims on it to shorten up the travel a little bit to hopefully get back to a .012 light or something. In the rush, I guess I didn't tighten up on the top of the button and that was the end of that."

The try at a better light caused Biondo to have a terribly uncharacteristic .144 red and send reigning NHRA National champ Ryan McClanahan to the winner's circle. "When I pushed down on the button, the car started rocking back and forth. I bumped the top of the button and the car just took off," he added.

"The experience of running out west with some guys I don't normally get to race with was a really cool experience and to be there to see them win, well that was even better," he continued. "My buddy Steve Casner winning in Super Gas and Steve Williams from K&N winning in Super Comp. That was great to be there for that."

Biondo not only currently sits number one nationally in Super Gas and number three in Super Stock, but he is also looking to secure both NHRA Div. 1 class championships, as well.

"I couldn't do what I do as a driver and stay focused on the tasks at hand if I didn't use parts on any of my cars that I didn't fully trust one-hundred percent," he pointed out. "My K&N oil and air filters more than do the job I need for them to do, especially when I am at a race like Reading was, where we are making hot laps. The cars have to be there for me and with K&N protecting them in so many ways, it's just something I never have to even give a second thought to."

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.