Alliant Power
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Alliant Power: America's Trusted Source for Diesel Engine Components
Few names carry as much weight in the diesel world as Alliant Power. Founded in 1961 as Diesel Injection Service (DIS) — a fuel injection rebuild center in South Central Wisconsin — the company has spent more than six decades evolving into one of the nation's leading distributors of critical diesel engine components. That long history isn't just a milestone; it represents decades of hard-won expertise in understanding exactly what diesel engines demand.
The Alliant Power brand as it exists today was formally established through a strategic partnership with Caterpillar® Fuel Systems, and the company has since grown into a nationwide integrator for powertrain repair parts. Headquartered in Windsor, Wisconsin, Alliant Power serves everyone from independent fuel shop owners and fleet managers to heavy-duty repair professionals — covering engines from Cummins, Ford, GM, Dodge, PACCAR, Daimler Truck, and Volvo CV, among others.
A Complete Diesel Parts Ecosystem
What sets Alliant Power apart from generic parts suppliers is the depth and precision of their catalog. Their product organization follows four core disciplines: Air Systems, Fuel Systems, Engine Systems, and Maintenance — a structure that reflects how diesel technicians actually think about and diagnose engine problems.
Alliant Power's fuel system components are among their most celebrated product lines. From high-pressure oil pumps and fuel injection pumps to Fuel Injector Control Modules (FICMs) and complete injector sets, Alliant builds each part to strict OE specifications. Their remanufactured fuel injectors, for example, undergo rigorous end-of-line testing at up to 15 different pressures and pulse widths to verify performance before leaving the facility.
On the air side, Alliant Power turbochargers and air system parts address one of the most demanding areas of diesel maintenance. Turbocharger mounting kits, boost sensors, and related components are engineered to restore factory-level airflow and efficiency — critical for emissions compliance and fuel economy alike.
The engine systems category spans an impressive range, including gaskets, seals, O-rings, water pumps, oil system components, alternators, and coolant thermostats. Alliant's gaskets and sealing components use high-quality materials specifically chosen to withstand the thermal cycling and pressures unique to diesel applications.
Alliant Power is also a recognized authority in diesel aftertreatment and emissions components — an increasingly important area as emissions regulations tighten across all vehicle classes. The brand recently announced an exclusive partnership with Schaeffler, making them the first aftermarket distributor of OE NOx sensors in the United States and Canada.
Rounding out their lineup, Alliant Power electrical components and sensors include exhaust back pressure sensors, fuel rail pressure sensors, accelerator pedal position sensors, connector pigtails, and wiring harnesses — the often-overlooked electronics that keep modern diesel management systems functioning accurately.
OE Quality, Nationwide Reach
Alliant Power operates a network of more than 550 service dealers and central distributors across North America, ensuring that parts are available when and where technicians need them. Their catalog spans over 40,000 SKUs, covering new, remanufactured, and OEM-sourced components. For diesel professionals who can't afford downtime, that combination of depth, quality, and availability is exactly what keeps Alliant Power at the top of the industry.