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The RK-3955 intake adds a classic ram-air look to the Harley V-twin

The K&N RK-3955 Street Metal Intake harkens back to the aggressive styling of muscle car shaker ram-air intakes. However, it’s not just a look; the RK-3955 intake is guaranteed to boost the performance of the Harley 107CI Milwaukee 8 FL model line. Let’s take a look at the style and performance of the RK-3955.

Style

The powdercoated aluminum body of the RK-3955 is open in the front, exposing the familiar and respected K&N filter element. Flowing back from that ram-air leading edge are raised, natural aluminum ridges that add an aggressive, three-dimensional element to the most visible surface of the intake.

K&N's designers outdid themselves with the aggressive look of the RK-3955 intake

Performance

'All show and no go' is simply not what K&N does. The RK-3955 is as long on performance as it is on style. The intake is built around a highly refined internal velocity stack that provides and focuses a large amount of air. There are also internal breathers that eliminate the stock plumbing.

That same housing that provides those great looks is also designed to provide massive airflow to the engine. That increase in airflow is where the power is. When installed on an otherwise stock 2017 107CI Harley-Davidson Road Glide, K&N’s testing showed an estimated power increase of almost 3.5 horsepower at 4700 RPM.

Convenience

An engineered velocity stack is housed in that great looking intake body

Take a look at the application list below and consult K&N online search tool for all of your filter needs.

2017 HARLEY DAVIDSON FLTRXS ROAD GLIDE SPECIAL 107 CI - All Models
2017 HARLEY DAVIDSON FLTRX ROAD GLIDE 107 CI - All Models
2017 HARLEY DAVIDSON FLTRU ROAD GLIDE ULTRA 107 CI - All Models
2017 HARLEY DAVIDSON FLRT FREEWHEELER 107 CI - All Models
2017 HARLEY DAVIDSON FLHXS STREET GLIDE SPECIAL 107 CI - All Models
2017 HARLEY DAVIDSON FLHX STREET GLIDE 107 CI - All Models
2017 HARLEY DAVIDSON FLHTKL ULTRA LIMITED LOW 107 CI - All Models
2017 HARLEY DAVIDSON FLHTK ULTRA LIMITED 107 CI - All Models
2017 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA 107 CI - All Models
2017 HARLEY DAVIDSON FLHR ROAD KING 107 CI - All Models

Bill McAnally Racing driver Todd Gilliland won the 2017 NASCAR K&N Pro Series West championship.

Gilliland was the runner-up in the West Coast Stock Car Hall of Fame Championship 150 presented by Napa Auto Parts, the final race of the 2017 NASCAR K&N Pro Series West season.

Gilliland needed to finish in seventh place or higher to win the K&N Pro Series West championship. Chris Eggleston, who entered the season finale in second place in the West Series standings, had a flat tire on lap 65 and had to pit. When he returned to the race, he was several laps down and out of contention.

That left Gilliland in a race against the track. All he needed to do was bring the car home in one piece to secure his second K&N Pro Series West championship. Eggleston ended up in second place in the K&N Pro Series West standings.

The runner-up finish in the race at Kern County gave Gilliland 11 top-fives in 14 K&N Pro Series West races. He won the K&N Pro Series West championship by 29 points over Eggleston. The two drivers posted the same amount of top-five finishes, 11, and top-10 finishes, 13. The difference was in races won.

Gilliland won six races en route to his second K&N Pro Series West title in a row. Gilliland and Eggleston, his teammate at Bill McAnally Racing, combined to win 10 of the 14 K&N Pro Series West races in 2017.

“That makes it definitely very interesting in the team meeting,” Gilliland said about having Eggleston as a teammate and championship contender. “Overall, I think Bill let us race as hard as we could. I feel like he did a great job balancing that for us. I feel like we pushed each other a lot this year to be the best we could be. That’s a lot of why we finished 1-2 in the points.”

Todd Gilliland won the pole and finished in second place in the K&N Pro Series West season finale.

Gilliland ran the entire K&N Pro Series East schedule as well. He came into the final race of the East Series schedule with the lead in the standings. But Gilliland blew a tire and crashed in the K&N Pro Series East finale at Dover International Speedway in Delaware, effectively taking him out of the lead in the K&N Pro Series East standings. He finished in 13th place in the race at Dover. Harrison Burton won the race and the K&N Pro Series East championship.

“To come this close to getting them both is tough also,” Gilliland said after winning the K&N Pro Series West championship at Kern County. “It’s all part of racing, the 99 (Eggleston) had a tire issue tonight, so hard saying what could have happened if we didn’t have one.”

Gilliland said a big part of winning the K&N Pro Series West championship came at the beginning of the year. The first four races were in a span of seven days at three tracks, Tucson Speedway, Kern County Raceway Park and Irwindale Speedway.

“That was a pretty big part of our season right there and we were able to come out of there with three wins and a second,” Gilliland said. “That set a good tone for the beginning of our season. From there we stayed in the lead all the way until the championship. It was pretty good. Definitely had a lot of battles with our teammates. It was a lot of fun for sure.”

Rookie Derek Kraus won the first race of his K&N Pro Series West career at Kern County. He posted three runner-up finishes in his rookie season. In the K&N Pro Series West race at Meridian Speedway in Idaho in September, he had the lead on the final restart. But he lost his lead to Michael Self, who went on to win the race. Kraus dropped to fifth place at the checkered flag. Kraus wasn’t going to make the same mistake at Kern County.

Todd Gilliland won six races en route to his second NASCAR K&N Pro Series West championship in a row

Gilliland said he will probably race a few NASCAR K&N Pro Series events in 2018. He is ready to move up in NASCAR and will enter more Camping World Truck Series events next year. Racing in the K&N Pro Series has prepared him immensely for the next step.

“It’s just a huge deal to be able to compete in this series,” Gilliland said. “Nothing’s possible without the support of K&N. Definitely want to thank them for everything they’ve done.”

While Chevrolets and Fords are without question the most popular choices among builders who are constructing display vehicles for the SEMA Show, there’s always a bit of variety whether it’s a model from an import manufacturer, or a domestic manufacturer long defunct. One brand that runs closely behind the Ford and Chevrolet offerings are the Mopars – Dodge and Plymouth primarily. Here’s a rundown of some of the most unique and inventive interpretations of classic and current Mopars on display at the 2017 SEMA Show.

Petty’s Garage 1970 Plymouth Superbird

Petty's Garage recreated a street version 1970 Superbird in Petty colors from a Plymouth Satellite

Ratty on the outside, gnarly on the inside: Jesse James' twin-turbocharged Hemi-powered Polara

The Roadster Shop constructed this interesting concept for Jesse James. The unibody was cut away from this ’64 Polara and all rust repaired. They then installed on an RS FastTrack frame. Under the hood went an immensely powerful Wegner Motorsports twin-turbo Generation III Hemi engine that draws through K&N air filters to produce over 1600 horsepower. The interior appears to have been removed for an early 1960s factory-built drag car with its minimalist interior, while the exterior is the sunbaked patina you might expect but a carefully-planned illusion executed by the Roadster Shop.

1968 Dodge Charger “General Mayhem”

The General Mayhem, now powered by a 707 HP Hellcat engine, is a car looking for trouble

Watch out for the sting of this Super Bee, with its 700 CID bottle-fed Hemi powerplant

Ken Ticknor’s Charger might be better named Killer Bee to separate if from the factory stock Super Bee, as its modifications are so significant. Under the carbon fiber hood beats an enlarged 7.0L Generation III chock full of forged internal components that can take the strain of a direct port nitrous system, drawing, of course, through K&N filtration.

Underneath is a full coil-over conversion with stouter sway bars, while the interior has been upgraded to second generation Charger configuration. Not just a straight swap, mind you, but also a recover with over 30 hides of smooth-shaved crocodile with dyed honeycomb. Certainly not a Super Bee that’s easily mistaken from one that is straight off the assembly line.

If you own a Chrysler, Dodge, Plymouth, or RAM, K&N has the filters you need to keep you classic or soon-to-be classic running at its peak. Whether it’s an air cleaner element for a 1958 Chrysler 300 with a 392 CID First Gen Hemi or a Typhoon air intake system that adds almost 24 horsepower to a 2018 Dodge Challenger Hellcat, K&N has it. And don’t forget K&N also offers cabin air filters, oil filters, and fuel filters for many Mopar applications.

The KA-1016R adds more knee-draging power to the ZX-10R (photo: Kawasaki)

The newest flagship Kawasaki sport bike has one of the most advanced fuel delivery systems on the market. The four 47mm Mikuni throttle bodies feature oval sub-throttles. Each one delivers fuel through two injectors per cylinder.

To cap it off, the latest Ninjas have redesigned cylinder heads featuring straighter and wider ports. To get the most air/fuel mixture to feed that beast of an engine, you need a free flowing air filter. That’s where the KA-1016R comes in.

Just 2 layers of filter material adds up to massive air flow with the KA-1016R

Unlike K&N’s standard, direct replacement units, this high-flow, track-only filter will require fuel management modifications. When combined with engine remapping, and possibly a less restrictive exhaust if you choose, the KA-1016R will deliver markedly increased torque and horsepower to the Ninja’s rear wheel.

The KA-1016R is fully washable and reusable, making post-race maintenance a snap. You can put a stop to the endless cycle of replacing expensive disposable air filter elements that eat up your race and track budget! All you need is a K&N recharge kit like the 99-5000.

The K&N Race-Specific KA-1016R comes pre-oiled and ready to install in your Ninja

The K&N KA-1016R comes with a one year limited warranty. This product is for closed course competition use only and fits the following bikes:

2018 KAWASAKI ZX1000 NINJA ZX-10R 998 - Race Specific
2017 KAWASAKI ZX1000 NINJA ZX-10R KRT EDITION 998 - Race Specific
2017 KAWASAKI ZX1000 NINJA ZX-10R ABS KRT EDITION 998 - Race Specific
2017 KAWASAKI ZX1000 NINJA ZX-10R ABS 998 - Race Specific
2017 KAWASAKI ZX1000 NINJA ZX-10R 998 - Race Specific
2016 KAWASAKI ZX1000 NINJA ZX-10R KRT EDITION 998 - Race Specific
2016 KAWASAKI ZX1000 NINJA ZX-10R ABS KRT EDITION 998 - Race Specific
2016 KAWASAKI ZX1000 NINJA ZX-10R ABS 998 - Race Specific
2016 KAWASAKI ZX1000 NINJA ZX-10R 998 - Race Specific

The 63-1139 intake is the embodiment of style and performance

Performance

The stock air intake on the 2017 Harley-Davidson® 107CI FL models restricts airflow. The 63-1139 performance air intake opens up the lungs on that big V-twin, and that increase in airflow adds the potential for a substantial performance boost.

An example of the estimated power increase is revealed in the dyno charts that K&N’s testing showed when the 63-1139 was installed on an otherwise stock 2017 107CI Harley-Davidson Road Glide. The intake bumped up the Glide’s muscle by almost 3.5 estimated horsepower at just over 4400 RPM. Just as importantly, the intake unleashed an estimated 5 foot-pounds of torque at the acceleration sweet spot of approximately 3600 RPM.

Everything that is needed for easy installation is included in the 63-1139 kit

Design and Style

The forward-sweeping, cast aluminum high-performance intake tube cuts a mean and aggressive profile on the right side of the 2017 Harley FL models. The matte black finish is accented with a brushed aluminum K&N logo and raised horizontal ridges. That intake tube houses an internal velocity stack and innovative built-in breathers.

The 63-1139 performance air intake is capped off with a K&N high-flow cotton gauze air filter. The exposed conical filter element leaves no doubt that your Harley is fitted with the ultimate in performance and protection.

The sweeping bend of the the 63-1139 intake allows a massive flow of air

The installation of the intake is a straight-forward process. When assisted by K&N’s clear and detailed instructions and basic hand tools, the installation takes about 90 minutes. That’s it.

The occasional cleaning of the washable and reusable air filter element is a simple process using a kit like the K&N 99-5050. K&N’s engineers have made both the fitting and care of the 63-1139 a snap.

Applications

The 63-1139 performance air intake fits the Harley models in the list below. For all of your filter needs, consult K&N’s online application tool.

2017 HARLEY DAVIDSON FLTRXS ROAD GLIDE SPECIAL 107 CI - All Models
2017 HARLEY DAVIDSON FLTRX ROAD GLIDE 107 CI - All Models
2017 HARLEY DAVIDSON FLTRU ROAD GLIDE ULTRA 107 CI - All Models
2017 HARLEY DAVIDSON FLRT FREEWHEELER 107 CI - All Models
2017 HARLEY DAVIDSON FLHXS STREET GLIDE SPECIAL 107 CI - All Models
2017 HARLEY DAVIDSON FLHX STREET GLIDE 107 CI - All Models
2017 HARLEY DAVIDSON FLHTKL ULTRA LIMITED LOW 107 CI - All Models
2017 HARLEY DAVIDSON FLHTK ULTRA LIMITED 107 CI - All Models
2017 HARLEY DAVIDSON FLHTCUTG TRI GLIDE ULTRA 107 CI - All Models
2017 HARLEY DAVIDSON FLHR ROAD KING 107 CI - All Models