The Cummins ISX15 is North America’s most popular heavy-duty engine, trusted by every major Class 8 truck manufacturer and favored by drivers and fleet operators for its unmatched performance, fuel economy, durability, and reliability. With horsepower ratings from 400-600 hp (298-447 kW) and up to 2050 lb-ft (2779 N·m) of peak torque, the ISX15 is the industry’s go-to choice for heavy-duty applications in trucks like Peterbilt, Kenworth, Freightliner, and more.
Why Choose the Cummins ISX15?
Fuel Economy
The ISX15 leads the industry in fuel efficiency, delivering up to 2% better fuel economy through refined technology introduced in 2013. Optimized fuel and water pumps, enhanced combustion, and fewer active regenerations of the aftertreatment system maximize usable horsepower while minimizing fuel costs, making it a cost-effective choice for fleet operators.
The ISX15 leads the industry in fuel efficiency, delivering up to 2% better fuel economy through refined technology introduced in 2013. Optimized fuel and water pumps, enhanced combustion, and fewer active regenerations of the aftertreatment system maximize usable horsepower while minimizing fuel costs, making it a cost-effective choice for fleet operators.
Durability
Built for longevity, every component of the ISX15 is designed to optimize fuel economy, performance, and durability while offering the lowest operating costs in its class. Fully integrated systems, from air handling to exhaust aftertreatment, ensure unmatched reliability, keeping your truck on the road longer.
Built for longevity, every component of the ISX15 is designed to optimize fuel economy, performance, and durability while offering the lowest operating costs in its class. Fully integrated systems, from air handling to exhaust aftertreatment, ensure unmatched reliability, keeping your truck on the road longer.
Performance
With ratings from 400-600 hp and up to 2050 lb-ft of torque, the ISX15 delivers exceptional power. SmartTorque ratings provide an additional 200 lb-ft of torque in the top two gears, enabling Class 8 trucks to conquer steep grades with fewer downshifts. Vocational ratings offer extra torque in lower gears for specialized applications, ensuring versatility and strength.
With ratings from 400-600 hp and up to 2050 lb-ft of torque, the ISX15 delivers exceptional power. SmartTorque ratings provide an additional 200 lb-ft of torque in the top two gears, enabling Class 8 trucks to conquer steep grades with fewer downshifts. Vocational ratings offer extra torque in lower gears for specialized applications, ensuring versatility and strength.
Emissions Compliance
The ISX15 was the first engine certified to meet 2014 EPA and DOT regulations, a full year ahead of schedule. Equipped with On-Board Diagnostics (OBD) since 2013, it ensures optimal emissions performance with a proprietary Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) system for near-zero emissions.
The ISX15 was the first engine certified to meet 2014 EPA and DOT regulations, a full year ahead of schedule. Equipped with On-Board Diagnostics (OBD) since 2013, it ensures optimal emissions performance with a proprietary Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) system for near-zero emissions.
Warranty
The ISX15 comes with a comprehensive base engine warranty covering parts and labor for warrantable failures, including the aftertreatment system, with no deductible. Extended coverage plans are available for up to 7 years or 500,000 miles (804,672 km) for the base engine, aftertreatment system, and major components, offering peace of mind for long-term operation.
The ISX15 comes with a comprehensive base engine warranty covering parts and labor for warrantable failures, including the aftertreatment system, with no deductible. Extended coverage plans are available for up to 7 years or 500,000 miles (804,672 km) for the base engine, aftertreatment system, and major components, offering peace of mind for long-term operation.
Key Features & Benefits:
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VGT™ Turbocharger (Cummins Turbo Technologies): Industry-leading patented design with electric actuation for precise responsiveness, improved fuel economy, and enhanced braking horsepower.
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XPI Fuel System (Cummins Fuel Systems): Delivers superior performance across all RPMs with multiple injection events per cycle for smoother, quieter operation and better fuel efficiency.
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Cummins Aftertreatment System (Cummins Emission Solutions): Combines DPF and SCR technology for near-zero emissions and regulatory compliance.
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Fleetguard® Filters and DEF (Cummins Filtration): High-quality fuel filters, and DEF protect against corrosion and contaminants, ensuring reliable performance.
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Single High-Capacity ECM: Manages engine and aftertreatment systems for optimal performance, fuel efficiency, and simplified diagnostics.
Applications: Ideal for heavy-duty Class 8 trucks, including Peterbilt, Kenworth, Freightliner, and other major brands, the ISX15 excels in long-haul, regional, and vocational applications. Confirm compatibility with your specific truck model and configuration by contacting Kustom Truck for expert fitment verification.
Why Kustom Truck?
Kustom Truck Parts offers genuine Cummins ISX15 components and accessories to support your engine’s performance and maintenance needs. From replacement parts to upgrade kits, our products are crafted to meet the high standards of the ISX15, ensuring durability and precision.
Kustom Truck Parts offers genuine Cummins ISX15 components and accessories to support your engine’s performance and maintenance needs. From replacement parts to upgrade kits, our products are crafted to meet the high standards of the ISX15, ensuring durability and precision.
