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K&N Air Intake System Delivers Big Power for 2011 to 2013 GMC Sierra and Chevy Silverado Trucks

K&N Air Intake Installed on Chevy Silverado 2500HD/3500HD Trucks
Chevy and GMC 2500HD/3500HD with K&N Air Intake Installed
Dyno Chart for K&N Chevy Silverado 2500HD/3500HD Trucks Air Intake 77-3076KTK
Dyno Chart for K&N 77-3076KTK for select year Chevy and GMC 2500HD/3500HD Trucks
2011 and 2012 GMC Sierra 2500HD and 3500HD and 2011 and 2012 Chevy Silverado 2500HD and 3500HD 6.0 liter gas engines are some of the more powerful available on the market today. Adequate airflow is the key to the performance of these large engines. On the flip side of the coin, every driver knows how important filtration is to a vehicle's operation and engine longevity. To balance high airflow and high filtration efficiency, K&N has developed the 77-3076KTK performance air intake system for 2011 and 2012 GMC Sierra and Chevy Silverado 2500HD and 3500HD trucks with 6.0 liter engines.
K&N Air Intake System for Chevy Silverado 2500HD/3500HD Trucks
K&N Air Intake for Chevy and GMC 2500HD/3500HD Trucks


Built for performance and show, the K&N 77-3076KTK High-Flow Performance Air Intake is a free-flowing mandrel-bent aluminum tube induction system designed to fit easily into 2011, 2012 and 2013 GMC Sierra and Chevy Silverado 2500 and 3500 6.0 liter models. This air intake system comes with a K&N high flow air filter, a custom designed heat shield and lid to help keep engine heat away and all the necessary components needed for installation. The system has fittings for the crankcase breather hose and a mass air sensor adapter custom designed to perform with the factory's electronics. On top of utilizing the highest quality, vehicle-specific components, the 77-3076KTK is also backed by K&N's Million Mile Limited Warranty, giving owners the peace of mind to know that their investment is safe.
K&N Air Intake Installed on Chevy Silverado 2500HD/3500HD Trucks
K&N Air Intake Installed on Chevy and GMC 2500HD/3500HD


K&N air intake systems are a simple bolt-on installation that replaces the vehicle's stock restrictive factory air filter and air intake setup. The 77-3076KTK is also designed to dramatically reduce intake restriction while it straightens air flow. This allows your vehicle's engine to inhale a larger amount of air than the OEM air filter assembly. Less restriction means more usable horsepower, torque and acceleration throughout the engine's RPM range. When dyno tested, the air intake system showed an estimated performance increase of 10 horsepower at 5033rpm and 10 lb-ft of torque at 4736rpm on a 2012 Chevrolet 2500HD pickup with a 6.0 liter V8 engine. The air intake system also allows for an increase in engine sound offering a deeper throatier roar when you step on the gas.
K&N Air Intake System for Chevy Silverado 2500HD/3500HD Trucks
Chevy and GMC 2500HD/3500HD Air Inntake System


The performance air filter, part RF-1042XD, used on the 77-3076KTK intake is also washable and reusable. Being washable and reusable, the RF-1042XD air filter can go up to100,000 miles depending on driving conditions and it is easily cleaned using the K&N recharger kit meaning you can have more time on the road and less time changing expensive disposable air filters in your garage. The filter is designed with a woven oiled cotton media to ensure excellent filtration efficiency for engine protection.

The 77-3076KTK comes with step-by-step install instructions for easy installation. Including pictures of each component and area of the engine bay as parts get removed and installed. Average installation time runs less than 90 minutes depending on the installer's skill level.

K&N manufactures many air intakes for Chevy Silverado 2500/3500 and GMC Sierra 2500/3500 trucks. See the Chevy Silverado 2500HD, the Chevy Silverado 3500HD, the GMC 2500 and GMC 3500 Truck Air Intake pages on KNFilters.com for details. Find K&N products for any 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.

Michael Lewis is Back to Full Speed in the 2013 FIA Formula 3 European Championship

Michael Lewis takes a moment to be alone with his thoughts before round 2 at Silverstone. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.
Michael Lewis takes a moment to be alone with his thoughts before round 2 at Silverstone. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.
“Life is what happens to you while you’re busy making other plans,” echoes the John Lennon lyrics. The musical reference alludes to the certainty that we really, ever, only have the slightest rein on our own destinies. Sometimes we may be looking to zig, but if life determines that we zag, the best we can do is to hang on and make course adjustments.
The No. 5 kfzteile24 MĂŒcke Motorsport Mercedes-Benz is ideally set up for Lewis to achieve victories. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.
The No. 5 kfzteile24 MĂŒcke Motorsport Mercedes-Benz is ideally set up for Lewis to achieve victories. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.


Since his days as a kid racing karts, Lewis has been on a clear path with his motorsports destiny. For the past couple of years he’s been living in Italy and competing in the FIA Formula 3 European Championship, it’s the farm league for the big show, Formula 1. The 22-year-old has been making it look easy, living away from home, shouldering the constant weight of big-time sponsorship expectations, and competing against some of the most talented young racers in the world. Lately though Lewis has had to make some of his own course adjustment, on and off the track, but demonstrating the heart of a champion in route to greatness, he’s found his line and he’s getting back up to full speed.

You joined the kfzteile24 MĂŒcke Motorsport team only a week before the second race of the season; does that mean you sat out round 1?
"Yes, I joined the team literally a week before the Silverstone Round 2 FIA Formula 3 European Championship weekend. It is really a great moment for me in my career to now be associated with such a strong team as kfzteile24 MĂŒcke Motorsport. Team Boss, Peter MĂŒcke, has organized a great group of people to produce fast race cars over the years and I am honored to represent his team at the races.”
Even with a lack of seat time in his new car, Lewis was able to demonstrate what he’s capable of in challenging conditions. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.
Even with a lack of seat time in his new car, Lewis was able to demonstrate what he’s capable of in challenging conditions. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.


There has to be a back-story to you changing teams so abruptly?
“There is definitely a back story to this change, but I must say that it is nothing but a positive one. The winter season from November 2012, to the very end of March 2013, was very long and trying for me as a race driver. Due to some political complications with my old team (Prema) I was unable to drive for them in 2013. Prema and I left on a good/professional note, so there is no animosity there. Prema has done good things for my career and I wish them a successful 2013.”

“Anyway, my father (who is sort of a manager for me) and myself found out we wouldn’t be racing with them pretty late into the offseason, around late December. In addition to that, there were some pretty intense complications in my personal family life that I had to tend to, which made things extremely complicated. These past winter months were the most difficult times I had ever faced in my life. First, I didn't know if I would race at all this 2013 season, and second I had to face and deal with all the political nonsense of a family divorce. However, as crazy as it sounds, my father and I remained resilient and determined to continue racing in Europe for 2013.”

“So as January-February-March 2013 played out, there were many discussions with high level teams in the FIA Formula 3 European Championship. I must thank every team for their time and desire to have me race for them. In the end, as things got down to the wire, the strong kfzteile24 MĂŒcke Motorsport team and Mercedes-Benz called us and presented a contract that was extremely positive.”
Despite some recent rough patches, Lewis is confident and at ease with his new team. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.
Despite some recent rough patches, Lewis is confident and at ease with his new team. Photo copyrighted by Tomas Suer, Motorsport Publication, & Marcello Puglisi.


“The team needed a fast driver to replace their lead No. 5 car, as that driver had been called up to DTM by Mercedes-Benz. So, unfortunately I was not driving at the first Monza Round1 FIA Formula 3 European Championship weekend, but being physically present at the Monza race was extremely beneficial.”

“kfzteile24 MĂŒcke Motorsport saw that I was available to drive (as I was in the paddock speaking with potential teams) and they said that I could start immediately with them for Round 2 at Silverstone. This was a sort of dream come true as kfzteile24 MĂŒcke Motorsport is a prestigious team.”

“I must really thank kfzteile24 MĂŒcke Motorsport and Mercedes-Benz for this opportunity, and I look forward to being competitive, winning races, and standing on the podium for 2013. This winter has made me stronger than ever as a person, as dealing with all of that adversity has given me valuable tools that I can use for the rest of my life. Every time I get in the car and drive, I enjoy it to the max and I really give my best effort because it's my passion and what I live for everyday."

Based on how you competed at Silverstone, is it reasonable to assume that your new team is a better fit with how you drive and race?
"Absolutely yes! I feel right at home in the No.5 Mercedes-Benz powered Dallara Formula 3 car. My mechanics, engineer (Peter FlĂŒckiger), and all of the team are very professional and give their best effort all the time. They want to win just as bad as I do, so we work together extremely well to achieve that goal. After being with kfzteile MĂŒcke Motorsport for a little over a week, I can see that the team is extremely passionate about racing, that each member of the team enjoys working together, and that the desire to win is there.”

You had some very positive sessions at Silverstone, what’s your take on the weekend now that you’ve had some time to reflect?
"It was definitely a good start to the weekend being P3 in Free Practice under the rain. I was P1 for most of the end parts of the session, and it was a great feeling to get back in the car. Qualifying in the dry did not go so well (in terms of a result), as the lack of dry seat time hurt me the most. It just took another few laps to get going, but there weren't "another few laps" to use really. So I just put in my best effort for what I had in Qually, and my engineer and I just looked towards the races to get mileage and develop our working relationship.”

“All three races were quite flawless in terms of driving: amazing starts, many great overtakes, and good/solid finishes. In Race 1 I started P20 and finished P13. In Race 2 I started P18 and finished P11. In Race 3 I started P13, was running in P11 at the end of the first lap when another driver crashed into the back of my car (sending me off the race track) in the Maggots-Becketts-Chapel complex. Aside from being crashed out of Race 3 from another driver, and the strange Qually, my pace and lap-by-lap consistency was quite strong."

With two rounds down, what goals do you look for from round 3 and for this season overall?
"I would like to Qualify in the top 10. I feel I can do an even better result, but I don't want to get too far ahead of myself. Like my engineer Peter FlĂŒckiger always tells me, 'Just do what the car can give you and don't invent anything crazy. Just drive and be strong lap by lap.' Hockenheim is a nice track and I know my kfzteile24 MĂŒcke Motorsport guys will give me a great car and their best effort for that event.”

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.

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Related K&N News Articles about Michael Lewis: K&N's Michael Lewis Earns His First Formula 3 Euro Series Victory in Valencia, Spain; Michael Lewis Finishes 6th in Formula 3 Euro Series at NĂŒrburgring in Germany; Michael Lewis Talks about the F3 Euro Series Championship and Skateboarding; Michael Lewis Stays with PREMA Powerteam to Compete In F3 Euro Series Championship

Ben Kennedy Wins First NASCAR K&N Pro Series East Race of His Career at Five Flags Speedway

Ben Kennedy wins NASCAR K&N Pro Series East race NAPA 150 at Five Flags Speedway
Ben Kennedy wins NASCAR K&N Pro Series East race NAPA 150 at Five Flags Speedway
Ben Kennedy won the first NASCAR K&N Pro Series East race of his career at Five Flags Speedway in Florida with two newcomers hot on his bumper.

Kennedy won the pole and led from start to finish in the NAPA Auto Parts 150, the third race in the K&N Pro Series East schedule. Rookie Gray Gaulding, a 15-year-old from South Carolina, was second. John Van Doorn, a 25-year from Michigan making his first K&N Pro Series East start, was third.
NASCAR K&N Pro Series East Rookie Gray Gaulding takes second place
NASCAR K&N Pro Series East Rookie Gray Gaulding takes second place


Kennedy, the great grandson of NASCAR founder Bill France Sr., won his first NASCAR race in the Euro-Racecar Series in Tours, France, last year. His win at Five Flags Speedway was his first in the United States. Kennedy’s previous best finish in the K&N Pro Series East was third.

“I didn’t know we would be that strong,” said Kennedy, driver of the No. 96 Ben Kennedy Racing Chevrolet. “We saved our tires as much as we could on the long runs. I think Gray had something for me that last restart there. I gave 110 percent those last three laps. It’s just something really cool and I’m speechless tonight.”
Ben Kennedy won the Coors Light Pole Award at NAPA 150
Ben Kennedy won the Coors Light Pole Award at NAPA 150


Duke Whiseant spun out on lap 136 and bunched up the field for the last restart of the race. Kennedy was able to stay ahead of Gaulding over the last 14 laps of the race. “We’ve been working on our restarts,” Kennedy said. “That’s been one of the things I’ve been trying to focus on lately. That’s been hurting is in the past. We really focused on it the other day when we came out here and tested. It definitely paid off on those restarts.”
First NASCAR K&N Pro Series East win for racer Ben Kennedy
First NASCAR K&N Pro Series East win for racer Ben Kennedy


Cale Conley spun out in turn four of the last lap of the race, but it didn’t result in a caution. Gaulding said he wanted one more chance to try to pass Kennedy on a restart. “It felt just like the waiting game,” Gaulding said. “At the end of the day, I kinda wished it was a green-white-checkered. As soon as (Kennedy) get on a five, six-lap run, he’s already taken off. It worked out really well. We got a clean race car, not one ding on it.”

It was Gaulding’s third top-10 finish and first top-five finish of the season.
Ben Kennedy and Gray Gaulding lead the pack during K&N Pro Series East race at Five Flags Speedway
Ben Kennedy and Gray Gaulding lead the pack during K&N Pro Series East race at Five Flags Speedway


“This is my first time ever coming here, Pensacola, wonderful track,” Gaulding said. “Can’t thank all the fans enough. We had a really great weekend. We knew how much hard work it takes to get here. I think in a couple weeks we’ll be able to be in Victory Circle. We’re working really hard for it.” Van Doorn capped a whirlwind weekend with a third-place finish at Pensacola.

“I don’t even know what to say, this is so unexpected,” said Van Doorn. "Seven days ago, I didn't even have this ride. The biggest thing was just learning the car and learning what the feel is.”
Ben Kennedy Team in Victory Lane after NAPA 150 at Five Flags Speedway in Pensacola, Florida
Ben Kennedy Team in Victory Lane after NAPA 150 at Five Flags Speedway in Pensacola, Florida


Brett Moffitt, the leader in the K&N Pro Series East standings, was fourth, followed by another impressive finish for Kenzie Ruston in fifth. It was her second top-five finish in a row.

Moffitt has a nine-point lead over Gaulding and Dylan Kwasniewski in the K&N Pro Series East standings. Ruston is in fourth place, 10 points behind Moffitt. The NAPA Auto Parts 150 from Five Flags Speedway will be televised on Speed on May 2 at 3 p.m. EST.

The next K&N Pro Series East race is the Blue Ox 100 at Richmond International Raceway in Virginia on April 25.

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.

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Related K&N News Articles about NASCAR K&N Pro Series East: Dylan Kwasniewski Wins NASCAR K&N Pro Series East Season Opener at Bristol Motor Speedway; NASCAR K&N Pro Series East Racer Gray Gaulding Gears up for 2013 Race Season; Corey LaJoie Wins NASCAR K&N Pro Series East Race at Greenville Pickens Speedway; Cale Conley Wins First NASCAR K&N Pro Series East Race at Columbus Motor Speedway in Ohio

K&N Adds Performance to the 2013 to 2015 Chevrolet Spark with High Flow Air Filter

K&N Air Filter for the Chevrolet Spark 1.2L
K&N Air Filter Back for the Chevrolet Spark 1.2 liter
At first glance, the 2013 Chevrolet Spark may seem a little out of place when compared to the other more common and much larger cars, trucks and SUVs on the road today. However if you look a bit harder, you will then start to see just how many cars are available that fit into this minicar/subcompact class, and you will begin to recognize that this size of vehicle is starting to become the norm.
Chevrolet Spark 1.2L K&N Air Filter
Chevrolet Spark 1.2 liter K&N Air Filter Front


The Chevy Spark comes with a very efficient 1.2 liter four cylinder engine that is rated at 84 hp @ 6,400 rpm and 83 lb-ft of torque @ 4,200 rpm. However by simply upgrading the stock air filter with a K&N 33-2492 air filter, you can help this engine. This high performance air filter is washable and reusable, plus, K&N's 33-2492 high flow air filter is engineered to increase horsepower and torque, while providing exceptional filtration and engine protection.
K&N's Performance Air Filter for the Chevrolet Spark 1.2L
K&N's Performance Air Filter for the Chevrolet Spark 1.2 liter


K&N's 33-2492 replacement air filter just drops into the stock air box without any trouble. The unique shape of the 33-2492 was engineered to allow for improved air flow while making sure the sealing edges match up correctly to the stock air box sealing surfaces. Replacing the stock filter should take no more than 5 minutes to replace; simply remove the screws securing the lid to the base, open the lid and replace the stock air filter with the K&N air filter, then resecure the lid; it is as simple as that.

Servicing the 33-2492 K&N reusable air filter is also just as easy by following the simple cleaning instructions using K&N's Recharger Kit (part no. 99-5000). Simply spray on the K&N air filter cleaner, let it soak in for a few minutes, rinse out the filter, let the air filter completely dry then reapply the air filter oil. For most drivers, servicing intervals can run up to 50,000 miles before cleaning is necessary, depending on your driving conditions. On top of the easy cleaning interval, you also get K&N's world famous Million Mile Limited Warranty, meaning that the 33-2492 air filter will truly be the last air filter you'll ever need to purchase for your 2013 Chevy Spark 1.2 liter.

The K&N 33-2492 reusable air filter will fit the following Chevrolet Spark models:
2015 Chevrolet Spark 1.2L L4 - All
2014 Chevrolet Spark 1.2L L4 - US
2013 Chevrolet Spark 1.2L L4 - US

As other Chevrolet Spark models become available use the Chevrolet Spark Air Filters page on KNFilters.com to find the right filter. 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.

2013 K&N Horsepower Challenge Champion Allen Johnson Sweeps NHRA Event in Las Vegas

NHRA racer Allen Johnson defeats Erica Enders-Stevens for K&N Horsepower Challenge Win
NHRA racer Allen Johnson defeats Erica Enders-Stevens for K&N Horsepower Challenge Win
With the odds all leaning in his favor, reigning NHRA Pro Stock champion Allen Johnson should have stopped by one of the numerous casinos during his latest trip to Las Vegas, walked to the nearest roulette table and ‘put it all’ on number one, as the number seems to be very fitting for him as of late. Carrying the number one on his new Mopar Express Lane Dodge Avenger, he not only started from the number one spot in the 2013 K&N Horsepower Challenge showdown event, he ended up there. Johnson won the 29th running of the prestigious race-within-a-race for the second time in his career and went on to win the SummitRacing.com NHRA Nationals on Sunday at The Strip at Las Vegas Motor Speedway.

The $121,000 K&N Horsepower Challenge showcases eight Pro Stock teams in the special bonus event. Seven of the teams qualified during a 15-race span from the 2012 Summit Racing Equipment NHRA Nationals in Norwalk through the 2013 Amalie Oil NHRA Gatornationals at Auto-Plus Raceway at Gainesville. The eighth-place team was selected again this year with a special fan vote that was conducted on the K&N website.
K&N Horsepower Challenge Champion Allen Johnson
K&N Horsepower Challenge Champion Allen Johnson


The double win paid huge for the Greenville, Tennessee driver, first pocketing the $50,000 K&N Horsepower Challenge championship check on Saturday after a fierce three rounds taking against some of the best in the business. Right out of the gate, Johnson faced off against teammate and K&N HPC fan vote competitor, Jeg Coughlin, Jr.

“Up to that point, he had out qualified us so he was faster than we were,” explained Johnson of his thoughts going into the first round of the Challenge. “We knew we just had to do the job. The only thing that I really had in my favor was lane choice. At Vegas all weekend, that really proved to be the winning deal for almost everybody was having lane choice and the right lane was where it was at.”

Coughlin managed to grab two hundredths at the tree, but Johnson made up for it all the way down the quarter-mile and when the pair crossed the stripe, the margin of victory for the Mopar Express Lane team was just .003, or mere inches.

That would set Allen Johnson up for a run against multi-time K&N Horsepower Challenge champ, Greg Anderson. Anderson had made his way by Mike Edwards in a close holeshot round win. But Anderson’s ET during that first round would cost him the all-important lane choice and Johnson would take full advantage and put Anderson over in the left lane. Anderson took the starting line lead, but Johnson quickly powered by him for the 6.687 to 6.773 win.

“The track changed from run to run,” Johnson pointed out of his slower second round ET. “Another thing that worked to our advantage, we [HPC competitors] were in the back of the pack [following field of Pro Stock qualifying] every run, so we would have one of our cars go out and down the track in front of us and with that information, it would help us determine which lane was the best.”

For the final in the K&N Horsepower Challenge, Johnson would face Erica Enders-Stevens for the first of two times during the exciting weekend. Enders-Stevens was looking for her first HPC win and she had advanced to her first final by defeating last year’s champ, Vincent Nobile in round one and Jason Line in the semifinals.

Again, it all came down to lane choice and Johnson took the right. Johnson gave it his all on the line and had a nice .010 reaction time to Enders-Stevens .041 and then they both experienced tire shake shortly after the launch. Enders-Stevens car was much more violent, causing her to make a move to the center and quickly aborted her run. Johnson, however, was able to recover and drive on down the quarter-mile to a 7.188. Not exactly the kind of number that Johnson’s team was looking for, but it was more than enough to grab the stipe and his second career K&N Horsepower Challenge championship.

“Even my lane gave me quite a fit during the final, since we had to run right in there with the fuel car rounds,” he said of the track conditions. “So with no track prep, we knew the track would just be junk but just did what we could to make it happen.”

Allen Johnson was not only a big winner but so was the K&N Horsepower Challenge Sweepstakes finalist who was lucky to be paired with him for the event. Vincent Jardine of Rockland, Illinois won a very special edition K&N 2013 Toyota Tundra pickup.

“He was a hoot,” said Johnson of Jardine. “Just everything about him was great. He stayed at our trailer all weekend and just rooted us on. It was really gratifying to be able to win and even more so to be able to win for someone else at the same time. Vince was going crazy when I came around the corner at the top end after the final, so it just made it all much more exciting. He was very thankful to K&N, as am I for dong the whole deal.”

“Steve Williams and all the folks from K&N are just quality people with quality products,” added Johnson. “The opportunity for the Pro Stock class to have an event like that to shoot for means a lot and K&N is just a class operation.”

Now with a cool $50,000 check from K&N, along with the coveted K&N HOC trophy and championship ring, Johnson needed to turn his attention to Sunday’s eliminations, both for a shot to win the SummitRacing.com NHRA Nationals and in doing so, grab the $25,000 double up bonus.

“I’m glad the thought of a shot at a double gave me a little extra adrenaline the next day, because I was wore out after everything the day before,” Johnson laughed. “Coming off of a high like that two days in a row just killed me.”

Like Saturday, Johnson used lane choice to his full advantage and slashed his way through the Pro Stock rounds only to meet up with Erica Enders-Stevens in the final for the second time of the weekend. This time it was Enders-Stevens with a big starting line advantage only to again have to push the clutch back in after the car got loose shortly after the tree. Johnson went down the track for the win and picked up the double-up bonus for winning the K&N Horsepower Challenge the day before.

That made it a $100,000 weekend for Allen Johnson, $25,000 for the event win, $25,000 for the NHRA bonus and $50,000 from the K&N Horsepower Challenge victory win. Johnson became the seventh driver to earn the double-up bonus and this is just the ninth time that it has happened over the last three decades the bonus event has taken place.

“It’s still a little behind Denver, but it’s getting really close,” joked Johnson about Vegas being his new favorite track. “Really I can’t thank all the crew enough, there’s not one person that is more important or that stands out more that another. They all made this incredible weekend and the K&N win possible.”

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.

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Related K&N News Articles about Allen Johnson:Current 2013 K&N Horsepower Challenge Point Leader Allen Johnson Picks Up Another Pro Stock Pole; NHRA Pro Stock Racer Allen Johnson Takes Early Point Lead in 2013 K&N Horsepower Challenge; Allen Johnson Sets Pace for the 2013 K&N Horsepower Challenge