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Mark Stek’s 2015 Ford F-250 Super Duty

Oskaloosa Express

Bob Carpenter
Jun 25, 2015
Photographers: Bob Carpenter
Most guys who have built a truck or two like to tell you all about them, but when you ask Mark Stek how many trucks he's been involved with, he simply states, "Too many to list." You see, Mark works at Kelderman Manufacturing, and he's headed up plenty of projects for both himself and the company.
So when Mark had the chance to team up with Wisconsin's Kunes Country Ford to build a new truck for himself, he already knew what to do. First of all, the truck is a gasser. Yep, no diesel fuel for this one, as it will not be doing extra-heavy-duty work, and the cost of the oil-burning engine just wasn't adding up when the build sheet was complete. That's fine, we're more interested in the eight-lug aspect of trucks than the powerplant anyway, so we asked Mark to fill us in on all the parts he chose for his build.
Photo 2/15   |   The Leer Locker 100XQ protects stuff that's in the bed while the Rackworks Rubicon Series cargo rack provides even more room for cargo.
That's the other thing about building a lot of trucks—you get to know which aftermarket products work the best and you gravitate toward them. Now, there's no doubt the truck would have a Kelderman air-ride suspension on it (4-to-6-inch four-link system), as Mark is no dummy. In fact, he went with the latest system for controlling it: the Hadley height control system (similar to that used on big rigs)—something more and more truck owners are opting for.
The Hadley Smart Air Management System (SAMS) is self-diagnosing, and the touchscreen allows access to troubleshooting for real-time feedback on the ride height sensors, compressor output, voltage, and more. The Kelderman-Hadley kit even includes a dual AMK air compressor setup that features built-in air dryers for use in cold weather climates. Want to lower your truck as far as it will go to make loading easier or to get into the garage? Just push a button. Hooking up a heavy trailer? The system automatically self-levels your truck. It makes everything easy.
Photo 3/15   |   This eight-lug truck has a gas engine, but it can do all the heavy lifting Mark needs.
After the truck got boosted up into the air with the suspension system, Mark had to fill the wheelwells with some quality metal and rubber, so he turned to BMF for a set of custom-painted B.A.T.L. 20x10 wheels wrapped with 37-inch Toyo Open Country R/T tires.
The engine didn't need much to satisfy Marks's needs, so he simply added an Airaid cold-air intake and a custom tune and taper bore throttle body (remember, this is a gas truck) from Paul's High Performance in Jackson, Michigan. Mark also uses an SCT X4 tuner. The exhaust is a black 4-inch MBRP system.
Photo 4/15   |   Kelderman Air Suspension and King remote reservoir shocks combine to provide a very comfortable ride with the 4-to-6-inch lift.
Mark spent the majority of his time making the truck look awesome. Nice touches like the custom painted-to-match PML differential covers on the front and back of the Ford make it stand out.
For the bumpers, Mark went with Raptor-style Fusion bumpers on the front and back. Lund fender extensions make sure the big tires are covered enough to keep law enforcement happy. Billet badges all the way around the truck and painted door handles and mirrors by Lynch Custom Painting do their part to customize the truck. Lynch also painted the headlights and added a "K" logo to them.
Amp Research PowerSteps make getting into and out of the truck a breeze, while the Bed Slide 2000 Pro makes loading and unloading the bed a much easier proposition. Any cargo is safely tucked away thanks to a Leer 100XQ Leer Locker on top of the bed.
A Rackworks Rubicon Series cargo rack allows for the transportation of bulky items, and the installation of a boatload of Rigid Industries lighting (on the rack, in the bumpers, on the undercarriage, and such) makes nighttime use easier and safer.
With all the experience Mark has with building so many trucks, it was never in doubt that the Oskaloosa Express would turn out just right for him. Never in doubt.
Photo 5/15   |   2015 Ford F 250 Front Passenger Side
Mark Stek works at Kelderman Manufacturing, and he has built a lot of trucks as a result of that connection. This one, however, is his. He built it the way he wanted it to look.
Photo 6/15   |   2015 Ford F 250 Grille
A custom "Kelderman Edition" grille and painted shell really change the look of the front of the '15 F-250 Super Duty
Photo 7/15   |   2015 Ford F 250 King Dampers On Steering Stabilizer
King dampers on the steering stabilizer prevent high-speed wobbles even though the tires are 37 inches tall.
Photo 8/15   |   2015 Ford F 250 Rackworks Cargo Carrier
There's room for supplies up top thanks to the Rackworks cargo carrier. Notice the plethora of Rigid Industries lights.
Photo 9/15   |   2015 Ford F 250 Batl Wheels And Toyo Open Contry Rt Tires
The 20x10 BMF B.A.T.L. wheels and Toyo Open Country R/T tires team up for an aggressive attitude and plenty of grip.
Photo 10/15   |   2015 Ford F 250 Fusion Bumper Trucks
The Fusion bumper tucks in very nicely around the truck's body curves and provides more places to mount Rigid LED lights.
Photo 11/15   |   2015 Ford F 250 Hadley System
The Hadley system manages all aspects of the air-ride suspension. It levels the truck out no matter what type of load you're carrying or towing.
Photo 12/15   |   2015 Ford F 250 Airaid Cold Air Intake
An Airaid cold-air intake provides the gas engine with more air than is needed to keep up with the power the SCT X4 (custom tuned by Paul's High Performance) pulls out.
Photo 13/15   |   2015 Ford F 250 Bmf Wheel Custom Paint
Custom paint by Lynch Custom Painting makes the BMF wheels look even better.
Photo 14/15   |   2015 Ford F 250 Amp Research Powersteps
Amp Research PowerSteps fold up when the doors are closed so you don't even see them. But when the doors are open, there's an easy way in and out.
Photo 15/15   |   2015 Ford F 250 Rigid Industries Led Lights
Rigid Industries LED lights are found all over the truck. It's quite a sight at night.

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